Finding the Fourth Proportional to 81,661.90, 112,698.98 and 45,367.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,661.90 : 112,698.98 = 45,367.50 : x
2. Step 2: Convert to fraction form
   81,661.90/112,698.98 = 45,367.50/x
3. Step 3: Cross multiply
   81,661.90x = 112,698.98 × 45,367.50
4. Step 4: Simplify right side
   81,661.90x = 5,112,870,975.15
5. Step 5: Solve for x
   x = 5,112,870,975.15/81,661.90
6. Step 6: Final answer
   x = 62,610.24