Finding the Fourth Proportional to 31,032.64, 42,795.25 and 20,846.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,032.64 : 42,795.25 = 20,846.71 : x
2. Step 2: Convert to fraction form
   31,032.64/42,795.25 = 20,846.71/x
3. Step 3: Cross multiply
   31,032.64x = 42,795.25 × 20,846.71
4. Step 4: Simplify right side
   31,032.64x = 892,140,166.13
5. Step 5: Solve for x
   x = 892,140,166.13/31,032.64
6. Step 6: Final answer
   x = 28,748.45