Finding the Fourth Proportional to 31,726.78, 43,763.12 and 20,411

Step by Step Solution

1. Step 1: Write the proportion equation
   31,726.78 : 43,763.12 = 20,411 : x
2. Step 2: Convert to fraction form
   31,726.78/43,763.12 = 20,411/x
3. Step 3: Cross multiply
   31,726.78x = 43,763.12 × 20,411
4. Step 4: Simplify right side
   31,726.78x = 893,249,042.32
5. Step 5: Solve for x
   x = 893,249,042.32/31,726.78
6. Step 6: Final answer
   x = 28,154.42