Finding the Fourth Proportional to 83,077.57, 124,616.76 and 20,748.07

Step by Step Solution

1. Step 1: Write the proportion equation
   83,077.57 : 124,616.76 = 20,748.07 : x
2. Step 2: Convert to fraction form
   83,077.57/124,616.76 = 20,748.07/x
3. Step 3: Cross multiply
   83,077.57x = 124,616.76 × 20,748.07
4. Step 4: Simplify right side
   83,077.57x = 2,585,557,259.65
5. Step 5: Solve for x
   x = 2,585,557,259.65/83,077.57
6. Step 6: Final answer
   x = 31,122.21