Finding the Fourth Proportional to 100,373.80, 138,493.72 and 57,923.32

Step by Step Solution

1. Step 1: Write the proportion equation
   100,373.80 : 138,493.72 = 57,923.32 : x
2. Step 2: Convert to fraction form
   100,373.80/138,493.72 = 57,923.32/x
3. Step 3: Cross multiply
   100,373.80x = 138,493.72 × 57,923.32
4. Step 4: Simplify right side
   100,373.80x = 8,022,016,061.55
5. Step 5: Solve for x
   x = 8,022,016,061.55/100,373.80
6. Step 6: Final answer
   x = 79,921.41