Finding the Fourth Proportional to 99,067.60, 136,700.58 and 56,629

Step by Step Solution

1. Step 1: Write the proportion equation
   99,067.60 : 136,700.58 = 56,629 : x
2. Step 2: Convert to fraction form
   99,067.60/136,700.58 = 56,629/x
3. Step 3: Cross multiply
   99,067.60x = 136,700.58 × 56,629
4. Step 4: Simplify right side
   99,067.60x = 7,741,217,144.82
5. Step 5: Solve for x
   x = 7,741,217,144.82/99,067.60
6. Step 6: Final answer
   x = 78,140.76