Finding the Fourth Proportional to 112,872.42, 169,309.56 and 91,787.94

Step by Step Solution

1. Step 1: Write the proportion equation
   112,872.42 : 169,309.56 = 91,787.94 : x
2. Step 2: Convert to fraction form
   112,872.42/169,309.56 = 91,787.94/x
3. Step 3: Cross multiply
   112,872.42x = 169,309.56 × 91,787.94
4. Step 4: Simplify right side
   112,872.42x = 15,540,575,734.71
5. Step 5: Solve for x
   x = 15,540,575,734.71/112,872.42
6. Step 6: Final answer
   x = 137,682.67