Finding the Fourth Proportional to 77,585, 116,384.25 and 21,425.18

Step by Step Solution

1. Step 1: Write the proportion equation
   77,585 : 116,384.25 = 21,425.18 : x
2. Step 2: Convert to fraction form
   77,585/116,384.25 = 21,425.18/x
3. Step 3: Cross multiply
   77,585x = 116,384.25 × 21,425.18
4. Step 4: Simplify right side
   77,585x = 2,493,553,505.42
5. Step 5: Solve for x
   x = 2,493,553,505.42/77,585
6. Step 6: Final answer
   x = 32,139.63