Finding the Fourth Proportional to 80,822.50, 111,538.50 and 45,012.50

Step by Step Solution

1. Step 1: Write the proportion equation
   80,822.50 : 111,538.50 = 45,012.50 : x
2. Step 2: Convert to fraction form
   80,822.50/111,538.50 = 45,012.50/x
3. Step 3: Cross multiply
   80,822.50x = 111,538.50 × 45,012.50
4. Step 4: Simplify right side
   80,822.50x = 5,020,626,731.25
5. Step 5: Solve for x
   x = 5,020,626,731.25/80,822.50
6. Step 6: Final answer
   x = 62,119.18