Finding the Fourth Proportional to 170,494.72, 255,815.83 and 91,516.75

Step by Step Solution

1. Step 1: Write the proportion equation
   170,494.72 : 255,815.83 = 91,516.75 : x
2. Step 2: Convert to fraction form
   170,494.72/255,815.83 = 91,516.75/x
3. Step 3: Cross multiply
   170,494.72x = 255,815.83 × 91,516.75
4. Step 4: Simplify right side
   170,494.72x = 23,411,433,360.15
5. Step 5: Solve for x
   x = 23,411,433,360.15/170,494.72
6. Step 6: Final answer
   x = 137,314.71