Finding the Fourth Proportional to 131,423.10, 196,681.05 and 78,870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   131,423.10 : 196,681.05 = 78,870.30 : x
2. Step 2: Convert to fraction form
   131,423.10/196,681.05 = 78,870.30/x
3. Step 3: Cross multiply
   131,423.10x = 196,681.05 × 78,870.30
4. Step 4: Simplify right side
   131,423.10x = 15,512,293,417.82
5. Step 5: Solve for x
   x = 15,512,293,417.82/131,423.10
6. Step 6: Final answer
   x = 118,033.23