Finding the Fourth Proportional to 99,116.39, 136,781.61 and 53,794.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,116.39 : 136,781.61 = 53,794.78 : x
2. Step 2: Convert to fraction form
   99,116.39/136,781.61 = 53,794.78/x
3. Step 3: Cross multiply
   99,116.39x = 136,781.61 × 53,794.78
4. Step 4: Simplify right side
   99,116.39x = 7,358,136,074.31
5. Step 5: Solve for x
   x = 7,358,136,074.31/99,116.39
6. Step 6: Final answer
   x = 74,237.33