Finding the Fourth Proportional to 1,388.76, 1,916.48 and 759.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.76 : 1,916.48 = 759.29 : x
2. Step 2: Convert to fraction form
   1,388.76/1,916.48 = 759.29/x
3. Step 3: Cross multiply
   1,388.76x = 1,916.48 × 759.29
4. Step 4: Simplify right side
   1,388.76x = 1,455,164.10
5. Step 5: Solve for x
   x = 1,455,164.10/1,388.76
6. Step 6: Final answer
   x = 1,047.82