Finding the Fourth Proportional to 1,942.29, 2,898.50 and 1,931.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,942.29 : 2,898.50 = 1,931.20 : x
2. Step 2: Convert to fraction form
   1,942.29/2,898.50 = 1,931.20/x
3. Step 3: Cross multiply
   1,942.29x = 2,898.50 × 1,931.20
4. Step 4: Simplify right side
   1,942.29x = 5,597,575.80
5. Step 5: Solve for x
   x = 5,597,575.80/1,942.29
6. Step 6: Final answer
   x = 2,881.95