Finding the Fourth Proportional to 1,380.08, 1,904.36 and 758.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.08 : 1,904.36 = 758.96 : x
2. Step 2: Convert to fraction form
   1,380.08/1,904.36 = 758.96/x
3. Step 3: Cross multiply
   1,380.08x = 1,904.36 × 758.96
4. Step 4: Simplify right side
   1,380.08x = 1,445,333.07
5. Step 5: Solve for x
   x = 1,445,333.07/1,380.08
6. Step 6: Final answer
   x = 1,047.28