Finding the Fourth Proportional to 78,785.67, 108,724.56 and 42,976.45

Step by Step Solution

1. Step 1: Write the proportion equation
   78,785.67 : 108,724.56 = 42,976.45 : x
2. Step 2: Convert to fraction form
   78,785.67/108,724.56 = 42,976.45/x
3. Step 3: Cross multiply
   78,785.67x = 108,724.56 × 42,976.45
4. Step 4: Simplify right side
   78,785.67x = 4,672,595,616.61
5. Step 5: Solve for x
   x = 4,672,595,616.61/78,785.67
6. Step 6: Final answer
   x = 59,307.68