Finding the Fourth Proportional to 112,465.59, 155,141.08 and 72,134.47

Step by Step Solution

1. Step 1: Write the proportion equation
   112,465.59 : 155,141.08 = 72,134.47 : x
2. Step 2: Convert to fraction form
   112,465.59/155,141.08 = 72,134.47/x
3. Step 3: Cross multiply
   112,465.59x = 155,141.08 × 72,134.47
4. Step 4: Simplify right side
   112,465.59x = 11,191,019,581.03
5. Step 5: Solve for x
   x = 11,191,019,581.03/112,465.59
6. Step 6: Final answer
   x = 99,506.17