Finding the Fourth Proportional to 92,942.10, 128,271.15 and 55,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   92,942.10 : 128,271.15 = 55,216.50 : x
2. Step 2: Convert to fraction form
   92,942.10/128,271.15 = 55,216.50/x
3. Step 3: Cross multiply
   92,942.10x = 128,271.15 × 55,216.50
4. Step 4: Simplify right side
   92,942.10x = 7,082,683,953.98
5. Step 5: Solve for x
   x = 7,082,683,953.98/92,942.10
6. Step 6: Final answer
   x = 76,205.34