Finding the Fourth Proportional to 112,434.42, 155,166.42 and 64,686.66

Step by Step Solution

1. Step 1: Write the proportion equation
   112,434.42 : 155,166.42 = 64,686.66 : x
2. Step 2: Convert to fraction form
   112,434.42/155,166.42 = 64,686.66/x
3. Step 3: Cross multiply
   112,434.42x = 155,166.42 × 64,686.66
4. Step 4: Simplify right side
   112,434.42x = 10,037,197,453.96
5. Step 5: Solve for x
   x = 10,037,197,453.96/112,434.42
6. Step 6: Final answer
   x = 89,271.57