Finding the Fourth Proportional to 1,403.86, 1,937.33 and 774.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.86 : 1,937.33 = 774.42 : x
2. Step 2: Convert to fraction form
   1,403.86/1,937.33 = 774.42/x
3. Step 3: Cross multiply
   1,403.86x = 1,937.33 × 774.42
4. Step 4: Simplify right side
   1,403.86x = 1,500,307.10
5. Step 5: Solve for x
   x = 1,500,307.10/1,403.86
6. Step 6: Final answer
   x = 1,068.70