Finding the Fourth Proportional to 1,398.42, 1,931.18 and 1,048.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.42 : 1,931.18 = 1,048.50 : x
2. Step 2: Convert to fraction form
   1,398.42/1,931.18 = 1,048.50/x
3. Step 3: Cross multiply
   1,398.42x = 1,931.18 × 1,048.50
4. Step 4: Simplify right side
   1,398.42x = 2,024,836.99
5. Step 5: Solve for x
   x = 2,024,836.99/1,398.42
6. Step 6: Final answer
   x = 1,447.95