Finding the Fourth Proportional to 112,874.42, 169,312.56 and 91,789.94

Step by Step Solution

1. Step 1: Write the proportion equation
   112,874.42 : 169,312.56 = 91,789.94 : x
2. Step 2: Convert to fraction form
   112,874.42/169,312.56 = 91,789.94/x
3. Step 3: Cross multiply
   112,874.42x = 169,312.56 × 91,789.94
4. Step 4: Simplify right side
   112,874.42x = 15,541,189,723.65
5. Step 5: Solve for x
   x = 15,541,189,723.65/112,874.42
6. Step 6: Final answer
   x = 137,685.67