Finding the Fourth Proportional to 82,128.06, 123,210.59 and 25,971.57

Step by Step Solution

1. Step 1: Write the proportion equation
   82,128.06 : 123,210.59 = 25,971.57 : x
2. Step 2: Convert to fraction form
   82,128.06/123,210.59 = 25,971.57/x
3. Step 3: Cross multiply
   82,128.06x = 123,210.59 × 25,971.57
4. Step 4: Simplify right side
   82,128.06x = 3,199,972,333.07
5. Step 5: Solve for x
   x = 3,199,972,333.07/82,128.06
6. Step 6: Final answer
   x = 38,963.20