Finding the Fourth Proportional to 31,106.34, 42,893.52 and 20,477.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,106.34 : 42,893.52 = 20,477.52 : x
2. Step 2: Convert to fraction form
   31,106.34/42,893.52 = 20,477.52/x
3. Step 3: Cross multiply
   31,106.34x = 42,893.52 × 20,477.52
4. Step 4: Simplify right side
   31,106.34x = 878,352,913.67
5. Step 5: Solve for x
   x = 878,352,913.67/31,106.34
6. Step 6: Final answer
   x = 28,237.10