Finding the Fourth Proportional to 99,392, 137,160.96 and 54,680

Step by Step Solution

1. Step 1: Write the proportion equation
   99,392 : 137,160.96 = 54,680 : x
2. Step 2: Convert to fraction form
   99,392/137,160.96 = 54,680/x
3. Step 3: Cross multiply
   99,392x = 137,160.96 × 54,680
4. Step 4: Simplify right side
   99,392x = 7,499,961,292.80
5. Step 5: Solve for x
   x = 7,499,961,292.80/99,392
6. Step 6: Final answer
   x = 75,458.40