Finding the Fourth Proportional to 99,840.33, 137,785.28 and 54,522.53

Step by Step Solution

1. Step 1: Write the proportion equation
   99,840.33 : 137,785.28 = 54,522.53 : x
2. Step 2: Convert to fraction form
   99,840.33/137,785.28 = 54,522.53/x
3. Step 3: Cross multiply
   99,840.33x = 137,785.28 × 54,522.53
4. Step 4: Simplify right side
   99,840.33x = 7,512,401,100.82
5. Step 5: Solve for x
   x = 7,512,401,100.82/99,840.33
6. Step 6: Final answer
   x = 75,244.15