Finding the Fourth Proportional to 34,978.56, 48,268.06 and 20,637.64

Step by Step Solution

1. Step 1: Write the proportion equation
   34,978.56 : 48,268.06 = 20,637.64 : x
2. Step 2: Convert to fraction form
   34,978.56/48,268.06 = 20,637.64/x
3. Step 3: Cross multiply
   34,978.56x = 48,268.06 × 20,637.64
4. Step 4: Simplify right side
   34,978.56x = 996,138,845.78
5. Step 5: Solve for x
   x = 996,138,845.78/34,978.56
6. Step 6: Final answer
   x = 28,478.56