Finding the Fourth Proportional to 82,407.78, 123,570.72 and 26,240.55

Step by Step Solution

1. Step 1: Write the proportion equation
   82,407.78 : 123,570.72 = 26,240.55 : x
2. Step 2: Convert to fraction form
   82,407.78/123,570.72 = 26,240.55/x
3. Step 3: Cross multiply
   82,407.78x = 123,570.72 × 26,240.55
4. Step 4: Simplify right side
   82,407.78x = 3,242,563,656.70
5. Step 5: Solve for x
   x = 3,242,563,656.70/82,407.78
6. Step 6: Final answer
   x = 39,347.79