Finding the Fourth Proportional to 1,028,620.64, 1,543,175.52 and 429,248.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028,620.64 : 1,543,175.52 = 429,248.72 : x
2. Step 2: Convert to fraction form
   1,028,620.64/1,543,175.52 = 429,248.72/x
3. Step 3: Cross multiply
   1,028,620.64x = 1,543,175.52 × 429,248.72
4. Step 4: Simplify right side
   1,028,620.64x = 662,406,116,695.33
5. Step 5: Solve for x
   x = 662,406,116,695.33/1,028,620.64
6. Step 6: Final answer
   x = 643,975.14