Finding the Fourth Proportional to 78,737.76, 108,630.99 and 54,855.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,737.76 : 108,630.99 = 54,855.72 : x
2. Step 2: Convert to fraction form
   78,737.76/108,630.99 = 54,855.72/x
3. Step 3: Cross multiply
   78,737.76x = 108,630.99 × 54,855.72
4. Step 4: Simplify right side
   78,737.76x = 5,959,031,170.76
5. Step 5: Solve for x
   x = 5,959,031,170.76/78,737.76
6. Step 6: Final answer
   x = 75,682.00