Finding the Fourth Proportional to 1,387.32, 2,079.55 and 738.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.32 : 2,079.55 = 738.10 : x
2. Step 2: Convert to fraction form
   1,387.32/2,079.55 = 738.10/x
3. Step 3: Cross multiply
   1,387.32x = 2,079.55 × 738.10
4. Step 4: Simplify right side
   1,387.32x = 1,534,915.86
5. Step 5: Solve for x
   x = 1,534,915.86/1,387.32
6. Step 6: Final answer
   x = 1,106.39