Finding the Fourth Proportional to 81,812.05, 112,897.96 and 45,513.31

Step by Step Solution

1. Step 1: Write the proportion equation
   81,812.05 : 112,897.96 = 45,513.31 : x
2. Step 2: Convert to fraction form
   81,812.05/112,897.96 = 45,513.31/x
3. Step 3: Cross multiply
   81,812.05x = 112,897.96 × 45,513.31
4. Step 4: Simplify right side
   81,812.05x = 5,138,359,851.85
5. Step 5: Solve for x
   x = 5,138,359,851.85/81,812.05
6. Step 6: Final answer
   x = 62,806.89