Finding the Fourth Proportional to 14,468.76, 21,581.51 and 13,139.96

Step by Step Solution

1. Step 1: Write the proportion equation
   14,468.76 : 21,581.51 = 13,139.96 : x
2. Step 2: Convert to fraction form
   14,468.76/21,581.51 = 13,139.96/x
3. Step 3: Cross multiply
   14,468.76x = 21,581.51 × 13,139.96
4. Step 4: Simplify right side
   14,468.76x = 283,580,004.53
5. Step 5: Solve for x
   x = 283,580,004.53/14,468.76
6. Step 6: Final answer
   x = 19,599.47