Finding the Fourth Proportional to 57,978.02, 86,956.56 and 26,380.64

Step by Step Solution

1. Step 1: Write the proportion equation
   57,978.02 : 86,956.56 = 26,380.64 : x
2. Step 2: Convert to fraction form
   57,978.02/86,956.56 = 26,380.64/x
3. Step 3: Cross multiply
   57,978.02x = 86,956.56 × 26,380.64
4. Step 4: Simplify right side
   57,978.02x = 2,293,969,705.00
5. Step 5: Solve for x
   x = 2,293,969,705.00/57,978.02
6. Step 6: Final answer
   x = 39,566.20