Finding the Fourth Proportional to 81,222.72, 112,082.16 and 45,415.68

Step by Step Solution

1. Step 1: Write the proportion equation
   81,222.72 : 112,082.16 = 45,415.68 : x
2. Step 2: Convert to fraction form
   81,222.72/112,082.16 = 45,415.68/x
3. Step 3: Cross multiply
   81,222.72x = 112,082.16 × 45,415.68
4. Step 4: Simplify right side
   81,222.72x = 5,090,287,512.27
5. Step 5: Solve for x
   x = 5,090,287,512.27/81,222.72
6. Step 6: Final answer
   x = 62,670.73