Finding the Fourth Proportional to 57,956.45, 86,821.88 and 42,731.29

Step by Step Solution

1. Step 1: Write the proportion equation
   57,956.45 : 86,821.88 = 42,731.29 : x
2. Step 2: Convert to fraction form
   57,956.45/86,821.88 = 42,731.29/x
3. Step 3: Cross multiply
   57,956.45x = 86,821.88 × 42,731.29
4. Step 4: Simplify right side
   57,956.45x = 3,710,010,284.86
5. Step 5: Solve for x
   x = 3,710,010,284.86/57,956.45
6. Step 6: Final answer
   x = 64,013.76