Finding the Fourth Proportional to 81,669.59, 112,689.79 and 45,365.21

Step by Step Solution

1. Step 1: Write the proportion equation
   81,669.59 : 112,689.79 = 45,365.21 : x
2. Step 2: Convert to fraction form
   81,669.59/112,689.79 = 45,365.21/x
3. Step 3: Cross multiply
   81,669.59x = 112,689.79 × 45,365.21
4. Step 4: Simplify right side
   81,669.59x = 5,112,196,399.71
5. Step 5: Solve for x
   x = 5,112,196,399.71/81,669.59
6. Step 6: Final answer
   x = 62,596.09