Finding the Fourth Proportional to 39,688.52, 59,527.31 and 13,389.84

Step by Step Solution

1. Step 1: Write the proportion equation
   39,688.52 : 59,527.31 = 13,389.84 : x
2. Step 2: Convert to fraction form
   39,688.52/59,527.31 = 13,389.84/x
3. Step 3: Cross multiply
   39,688.52x = 59,527.31 × 13,389.84
4. Step 4: Simplify right side
   39,688.52x = 797,061,089.58
5. Step 5: Solve for x
   x = 797,061,089.58/39,688.52
6. Step 6: Final answer
   x = 20,082.92