Finding the Fourth Proportional to 93,399.12, 139,276.10 and 92,556.72

Step by Step Solution

1. Step 1: Write the proportion equation
   93,399.12 : 139,276.10 = 92,556.72 : x
2. Step 2: Convert to fraction form
   93,399.12/139,276.10 = 92,556.72/x
3. Step 3: Cross multiply
   93,399.12x = 139,276.10 × 92,556.72
4. Step 4: Simplify right side
   93,399.12x = 12,890,938,990.39
5. Step 5: Solve for x
   x = 12,890,938,990.39/93,399.12
6. Step 6: Final answer
   x = 138,019.92