Finding the Fourth Proportional to 83,139.06, 124,728.34 and 26,979.33

Step by Step Solution

1. Step 1: Write the proportion equation
   83,139.06 : 124,728.34 = 26,979.33 : x
2. Step 2: Convert to fraction form
   83,139.06/124,728.34 = 26,979.33/x
3. Step 3: Cross multiply
   83,139.06x = 124,728.34 × 26,979.33
4. Step 4: Simplify right side
   83,139.06x = 3,365,087,045.21
5. Step 5: Solve for x
   x = 3,365,087,045.21/83,139.06
6. Step 6: Final answer
   x = 40,475.40