Finding the Fourth Proportional to 112,574.46, 155,266.20 and 78,572.10

Step by Step Solution

1. Step 1: Write the proportion equation
   112,574.46 : 155,266.20 = 78,572.10 : x
2. Step 2: Convert to fraction form
   112,574.46/155,266.20 = 78,572.10/x
3. Step 3: Cross multiply
   112,574.46x = 155,266.20 × 78,572.10
4. Step 4: Simplify right side
   112,574.46x = 12,199,591,393.02
5. Step 5: Solve for x
   x = 12,199,591,393.02/112,574.46
6. Step 6: Final answer
   x = 108,369.09