Finding the Fourth Proportional to 112,711.74, 155,531.43 and 67,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,711.74 : 155,531.43 = 67,380.72 : x
2. Step 2: Convert to fraction form
   112,711.74/155,531.43 = 67,380.72/x
3. Step 3: Cross multiply
   112,711.74x = 155,531.43 × 67,380.72
4. Step 4: Simplify right side
   112,711.74x = 10,479,819,736.03
5. Step 5: Solve for x
   x = 10,479,819,736.03/112,711.74
6. Step 6: Final answer
   x = 92,978.95