Finding the Fourth Proportional to 643,081.32, 964,553.76 and 264,042

Step by Step Solution

1. Step 1: Write the proportion equation
   643,081.32 : 964,553.76 = 264,042 : x
2. Step 2: Convert to fraction form
   643,081.32/964,553.76 = 264,042/x
3. Step 3: Cross multiply
   643,081.32x = 964,553.76 × 264,042
4. Step 4: Simplify right side
   643,081.32x = 254,682,703,897.92
5. Step 5: Solve for x
   x = 254,682,703,897.92/643,081.32
6. Step 6: Final answer
   x = 396,034.99