Finding the Fourth Proportional to 2,071.80, 3,123.20 and 1,934.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.80 : 3,123.20 = 1,934.31 : x
2. Step 2: Convert to fraction form
   2,071.80/3,123.20 = 1,934.31/x
3. Step 3: Cross multiply
   2,071.80x = 3,123.20 × 1,934.31
4. Step 4: Simplify right side
   2,071.80x = 6,041,227.32
5. Step 5: Solve for x
   x = 6,041,227.32/2,071.80
6. Step 6: Final answer
   x = 2,915.93