Finding the Fourth Proportional to 42,098.68, 63,158.42 and 12,516.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,098.68 : 63,158.42 = 12,516.38 : x
2. Step 2: Convert to fraction form
   42,098.68/63,158.42 = 12,516.38/x
3. Step 3: Cross multiply
   42,098.68x = 63,158.42 × 12,516.38
4. Step 4: Simplify right side
   42,098.68x = 790,514,784.92
5. Step 5: Solve for x
   x = 790,514,784.92/42,098.68
6. Step 6: Final answer
   x = 18,777.66