Finding the Fourth Proportional to 14,415.51, 21,502.16 and 13,086.71

Step by Step Solution

1. Step 1: Write the proportion equation
   14,415.51 : 21,502.16 = 13,086.71 : x
2. Step 2: Convert to fraction form
   14,415.51/21,502.16 = 13,086.71/x
3. Step 3: Cross multiply
   14,415.51x = 21,502.16 × 13,086.71
4. Step 4: Simplify right side
   14,415.51x = 281,392,457.50
5. Step 5: Solve for x
   x = 281,392,457.50/14,415.51
6. Step 6: Final answer
   x = 19,520.12