Finding the Fourth Proportional to 42,152.40, 63,232.85 and 13,688.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,152.40 : 63,232.85 = 13,688.16 : x
2. Step 2: Convert to fraction form
   42,152.40/63,232.85 = 13,688.16/x
3. Step 3: Cross multiply
   42,152.40x = 63,232.85 × 13,688.16
4. Step 4: Simplify right side
   42,152.40x = 865,541,051.89
5. Step 5: Solve for x
   x = 865,541,051.89/42,152.40
6. Step 6: Final answer
   x = 20,533.62