Finding the Fourth Proportional to 92,705.72, 139,037.31 and 55,276.43

Step by Step Solution

1. Step 1: Write the proportion equation
   92,705.72 : 139,037.31 = 55,276.43 : x
2. Step 2: Convert to fraction form
   92,705.72/139,037.31 = 55,276.43/x
3. Step 3: Cross multiply
   92,705.72x = 139,037.31 × 55,276.43
4. Step 4: Simplify right side
   92,705.72x = 7,685,485,438.42
5. Step 5: Solve for x
   x = 7,685,485,438.42/92,705.72
6. Step 6: Final answer
   x = 82,901.96