Finding the Fourth Proportional to 31,056.52, 42,877.48 and 20,464.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,056.52 : 42,877.48 = 20,464.16 : x
2. Step 2: Convert to fraction form
   31,056.52/42,877.48 = 20,464.16/x
3. Step 3: Cross multiply
   31,056.52x = 42,877.48 × 20,464.16
4. Step 4: Simplify right side
   31,056.52x = 877,451,611.12
5. Step 5: Solve for x
   x = 877,451,611.12/31,056.52
6. Step 6: Final answer
   x = 28,253.38