Finding the Fourth Proportional to 99,680.63, 137,562.59 and 54,361.08

Step by Step Solution

1. Step 1: Write the proportion equation
   99,680.63 : 137,562.59 = 54,361.08 : x
2. Step 2: Convert to fraction form
   99,680.63/137,562.59 = 54,361.08/x
3. Step 3: Cross multiply
   99,680.63x = 137,562.59 × 54,361.08
4. Step 4: Simplify right side
   99,680.63x = 7,478,050,960.00
5. Step 5: Solve for x
   x = 7,478,050,960.00/99,680.63
6. Step 6: Final answer
   x = 75,020.10