Finding the Fourth Proportional to 21,454.71, 29,612.30 and 13,501.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,454.71 : 29,612.30 = 13,501.59 : x
2. Step 2: Convert to fraction form
   21,454.71/29,612.30 = 13,501.59/x
3. Step 3: Cross multiply
   21,454.71x = 29,612.30 × 13,501.59
4. Step 4: Simplify right side
   21,454.71x = 399,813,066.05
5. Step 5: Solve for x
   x = 399,813,066.05/21,454.71
6. Step 6: Final answer
   x = 18,635.21