Finding the Fourth Proportional to 1,388.74, 1,916.47 and 759.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.74 : 1,916.47 = 759.27 : x
2. Step 2: Convert to fraction form
   1,388.74/1,916.47 = 759.27/x
3. Step 3: Cross multiply
   1,388.74x = 1,916.47 × 759.27
4. Step 4: Simplify right side
   1,388.74x = 1,455,118.18
5. Step 5: Solve for x
   x = 1,455,118.18/1,388.74
6. Step 6: Final answer
   x = 1,047.80