Finding the Fourth Proportional to 57,514.32, 86,307.33 and 21,978.81

Step by Step Solution

1. Step 1: Write the proportion equation
   57,514.32 : 86,307.33 = 21,978.81 : x
2. Step 2: Convert to fraction form
   57,514.32/86,307.33 = 21,978.81/x
3. Step 3: Cross multiply
   57,514.32x = 86,307.33 × 21,978.81
4. Step 4: Simplify right side
   57,514.32x = 1,896,932,407.68
5. Step 5: Solve for x
   x = 1,896,932,407.68/57,514.32
6. Step 6: Final answer
   x = 32,981.91