Finding the Fourth Proportional to 78,752.76, 108,651.66 and 54,870.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,752.76 : 108,651.66 = 54,870.72 : x
2. Step 2: Convert to fraction form
   78,752.76/108,651.66 = 54,870.72/x
3. Step 3: Cross multiply
   78,752.76x = 108,651.66 × 54,870.72
4. Step 4: Simplify right side
   78,752.76x = 5,961,794,813.40
5. Step 5: Solve for x
   x = 5,961,794,813.40/78,752.76
6. Step 6: Final answer
   x = 75,702.68