Finding the Fourth Proportional to 92,898.50, 128,158.81 and 55,150.88

Step by Step Solution

1. Step 1: Write the proportion equation
   92,898.50 : 128,158.81 = 55,150.88 : x
2. Step 2: Convert to fraction form
   92,898.50/128,158.81 = 55,150.88/x
3. Step 3: Cross multiply
   92,898.50x = 128,158.81 × 55,150.88
4. Step 4: Simplify right side
   92,898.50x = 7,068,070,372.58
5. Step 5: Solve for x
   x = 7,068,070,372.58/92,898.50
6. Step 6: Final answer
   x = 76,083.80