Finding the Fourth Proportional to 1,051,345,448.69, 1,575,779,718.65 and 429,172,117.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051,345,448.69 : 1,575,779,718.65 = 429,172,117.25 : x
2. Step 2: Convert to fraction form
   1,051,345,448.69/1,575,779,718.65 = 429,172,117.25/x
3. Step 3: Cross multiply
   1,051,345,448.69x = 1,575,779,718.65 × 429,172,117.25
4. Step 4: Simplify right side
   1,051,345,448.69x = 676,280,718,162,605,056
5. Step 5: Solve for x
   x = 676,280,718,162,605,056/1,051,345,448.69
6. Step 6: Final answer
   x = 643,252,623.59