Finding the Fourth Proportional to 42,059.16, 63,079.02 and 12,469.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,059.16 : 63,079.02 = 12,469.86 : x
2. Step 2: Convert to fraction form
   42,059.16/63,079.02 = 12,469.86/x
3. Step 3: Cross multiply
   42,059.16x = 63,079.02 × 12,469.86
4. Step 4: Simplify right side
   42,059.16x = 786,586,548.34
5. Step 5: Solve for x
   x = 786,586,548.34/42,059.16
6. Step 6: Final answer
   x = 18,701.91