Finding the Fourth Proportional to 1,920.31, 2,881.17 and 1,298.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.31 : 2,881.17 = 1,298.03 : x
2. Step 2: Convert to fraction form
   1,920.31/2,881.17 = 1,298.03/x
3. Step 3: Cross multiply
   1,920.31x = 2,881.17 × 1,298.03
4. Step 4: Simplify right side
   1,920.31x = 3,739,830.69
5. Step 5: Solve for x
   x = 3,739,830.69/1,920.31
6. Step 6: Final answer
   x = 1,947.52