Finding the Fourth Proportional to 34,978.56, 48,271.32 and 20,639.16

Step by Step Solution

1. Step 1: Write the proportion equation
   34,978.56 : 48,271.32 = 20,639.16 : x
2. Step 2: Convert to fraction form
   34,978.56/48,271.32 = 20,639.16/x
3. Step 3: Cross multiply
   34,978.56x = 48,271.32 × 20,639.16
4. Step 4: Simplify right side
   34,978.56x = 996,279,496.89
5. Step 5: Solve for x
   x = 996,279,496.89/34,978.56
6. Step 6: Final answer
   x = 28,482.58