Finding the Fourth Proportional to 99,108.79, 136,770.22 and 53,786.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,108.79 : 136,770.22 = 53,786.78 : x
2. Step 2: Convert to fraction form
   99,108.79/136,770.22 = 53,786.78/x
3. Step 3: Cross multiply
   99,108.79x = 136,770.22 × 53,786.78
4. Step 4: Simplify right side
   99,108.79x = 7,356,429,629.96
5. Step 5: Solve for x
   x = 7,356,429,629.96/99,108.79
6. Step 6: Final answer
   x = 74,225.81