Finding the Fourth Proportional to 12,478.71, 18,715.31 and 3,592.07

Step by Step Solution

1. Step 1: Write the proportion equation
   12,478.71 : 18,715.31 = 3,592.07 : x
2. Step 2: Convert to fraction form
   12,478.71/18,715.31 = 3,592.07/x
3. Step 3: Cross multiply
   12,478.71x = 18,715.31 × 3,592.07
4. Step 4: Simplify right side
   12,478.71x = 67,226,703.59
5. Step 5: Solve for x
   x = 67,226,703.59/12,478.71
6. Step 6: Final answer
   x = 5,387.31