Finding the Fourth Proportional to 1,505.12, 2,077.76 and 1,008.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,505.12 : 2,077.76 = 1,008.10 : x
2. Step 2: Convert to fraction form
   1,505.12/2,077.76 = 1,008.10/x
3. Step 3: Cross multiply
   1,505.12x = 2,077.76 × 1,008.10
4. Step 4: Simplify right side
   1,505.12x = 2,094,589.86
5. Step 5: Solve for x
   x = 2,094,589.86/1,505.12
6. Step 6: Final answer
   x = 1,391.64