Finding the Fourth Proportional to 1,388.51, 1,916.14 and 759.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.51 : 1,916.14 = 759.04 : x
2. Step 2: Convert to fraction form
   1,388.51/1,916.14 = 759.04/x
3. Step 3: Cross multiply
   1,388.51x = 1,916.14 × 759.04
4. Step 4: Simplify right side
   1,388.51x = 1,454,426.91
5. Step 5: Solve for x
   x = 1,454,426.91/1,388.51
6. Step 6: Final answer
   x = 1,047.47