Finding the Fourth Proportional to 112,978.71, 155,768.76 and 82,711.48

Step by Step Solution

1. Step 1: Write the proportion equation
   112,978.71 : 155,768.76 = 82,711.48 : x
2. Step 2: Convert to fraction form
   112,978.71/155,768.76 = 82,711.48/x
3. Step 3: Cross multiply
   112,978.71x = 155,768.76 × 82,711.48
4. Step 4: Simplify right side
   112,978.71x = 12,883,864,677.36
5. Step 5: Solve for x
   x = 12,883,864,677.36/112,978.71
6. Step 6: Final answer
   x = 114,037.99