Finding the Fourth Proportional to 47,123.80, 65,061.30 and 31,229.80

Step by Step Solution

1. Step 1: Write the proportion equation
   47,123.80 : 65,061.30 = 31,229.80 : x
2. Step 2: Convert to fraction form
   47,123.80/65,061.30 = 31,229.80/x
3. Step 3: Cross multiply
   47,123.80x = 65,061.30 × 31,229.80
4. Step 4: Simplify right side
   47,123.80x = 2,031,851,386.74
5. Step 5: Solve for x
   x = 2,031,851,386.74/47,123.80
6. Step 6: Final answer
   x = 43,117.31