Finding the Fourth Proportional to 466,230,978.72, 643,381,897.32 and 257,382,645.84

Step by Step Solution

1. Step 1: Write the proportion equation
   466,230,978.72 : 643,381,897.32 = 257,382,645.84 : x
2. Step 2: Convert to fraction form
   466,230,978.72/643,381,897.32 = 257,382,645.84/x
3. Step 3: Cross multiply
   466,230,978.72x = 643,381,897.32 × 257,382,645.84
4. Step 4: Simplify right side
   466,230,978.72x = 165,595,335,017,780,832
5. Step 5: Solve for x
   x = 165,595,335,017,780,832/466,230,978.72
6. Step 6: Final answer
   x = 355,178,747.39