Finding the Fourth Proportional to 112,586.31, 155,408.18 and 64,858.68

Step by Step Solution

1. Step 1: Write the proportion equation
   112,586.31 : 155,408.18 = 64,858.68 : x
2. Step 2: Convert to fraction form
   112,586.31/155,408.18 = 64,858.68/x
3. Step 3: Cross multiply
   112,586.31x = 155,408.18 × 64,858.68
4. Step 4: Simplify right side
   112,586.31x = 10,079,569,091.71
5. Step 5: Solve for x
   x = 10,079,569,091.71/112,586.31
6. Step 6: Final answer
   x = 89,527.48