Finding the Fourth Proportional to 112,105.72, 154,715.34 and 61,815.16

Step by Step Solution

1. Step 1: Write the proportion equation
   112,105.72 : 154,715.34 = 61,815.16 : x
2. Step 2: Convert to fraction form
   112,105.72/154,715.34 = 61,815.16/x
3. Step 3: Cross multiply
   112,105.72x = 154,715.34 × 61,815.16
4. Step 4: Simplify right side
   112,105.72x = 9,563,753,496.55
5. Step 5: Solve for x
   x = 9,563,753,496.55/112,105.72
6. Step 6: Final answer
   x = 85,310.13