Finding the Fourth Proportional to 1,402.08, 1,934.88 and 781.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.08 : 1,934.88 = 781.12 : x
2. Step 2: Convert to fraction form
   1,402.08/1,934.88 = 781.12/x
3. Step 3: Cross multiply
   1,402.08x = 1,934.88 × 781.12
4. Step 4: Simplify right side
   1,402.08x = 1,511,373.47
5. Step 5: Solve for x
   x = 1,511,373.47/1,402.08
6. Step 6: Final answer
   x = 1,077.95