Finding the Fourth Proportional to 42,098.72, 63,158.54 and 12,516.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,098.72 : 63,158.54 = 12,516.50 : x
2. Step 2: Convert to fraction form
   42,098.72/63,158.54 = 12,516.50/x
3. Step 3: Cross multiply
   42,098.72x = 63,158.54 × 12,516.50
4. Step 4: Simplify right side
   42,098.72x = 790,523,961.22
5. Step 5: Solve for x
   x = 790,523,961.22/42,098.72
6. Step 6: Final answer
   x = 18,777.86