Finding the Fourth Proportional to 99,258.89, 137,048.78 and 61,069.82

Step by Step Solution

1. Step 1: Write the proportion equation
   99,258.89 : 137,048.78 = 61,069.82 : x
2. Step 2: Convert to fraction form
   99,258.89/137,048.78 = 61,069.82/x
3. Step 3: Cross multiply
   99,258.89x = 137,048.78 × 61,069.82
4. Step 4: Simplify right side
   99,258.89x = 8,369,544,020.47
5. Step 5: Solve for x
   x = 8,369,544,020.47/99,258.89
6. Step 6: Final answer
   x = 84,320.35