Finding the Fourth Proportional to 112,410.64, 155,199 and 72,141.76

Step by Step Solution

1. Step 1: Write the proportion equation
   112,410.64 : 155,199 = 72,141.76 : x
2. Step 2: Convert to fraction form
   112,410.64/155,199 = 72,141.76/x
3. Step 3: Cross multiply
   112,410.64x = 155,199 × 72,141.76
4. Step 4: Simplify right side
   112,410.64x = 11,196,329,010.24
5. Step 5: Solve for x
   x = 11,196,329,010.24/112,410.64
6. Step 6: Final answer
   x = 99,602.04