Finding the Fourth Proportional to 83,079.30, 124,443.45 and 55,012.80

Step by Step Solution

1. Step 1: Write the proportion equation
   83,079.30 : 124,443.45 = 55,012.80 : x
2. Step 2: Convert to fraction form
   83,079.30/124,443.45 = 55,012.80/x
3. Step 3: Cross multiply
   83,079.30x = 124,443.45 × 55,012.80
4. Step 4: Simplify right side
   83,079.30x = 6,845,982,626.16
5. Step 5: Solve for x
   x = 6,845,982,626.16/83,079.30
6. Step 6: Final answer
   x = 82,402.99