Finding the Fourth Proportional to 123,711.98, 170,724.51 and 67,123.35

Step by Step Solution

1. Step 1: Write the proportion equation
   123,711.98 : 170,724.51 = 67,123.35 : x
2. Step 2: Convert to fraction form
   123,711.98/170,724.51 = 67,123.35/x
3. Step 3: Cross multiply
   123,711.98x = 170,724.51 × 67,123.35
4. Step 4: Simplify right side
   123,711.98x = 11,459,601,038.31
5. Step 5: Solve for x
   x = 11,459,601,038.31/123,711.98
6. Step 6: Final answer
   x = 92,631.30