Finding the Fourth Proportional to 1,380.17, 1,904.62 and 750.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.17 : 1,904.62 = 750.70 : x
2. Step 2: Convert to fraction form
   1,380.17/1,904.62 = 750.70/x
3. Step 3: Cross multiply
   1,380.17x = 1,904.62 × 750.70
4. Step 4: Simplify right side
   1,380.17x = 1,429,798.23
5. Step 5: Solve for x
   x = 1,429,798.23/1,380.17
6. Step 6: Final answer
   x = 1,035.96