Finding the Fourth Proportional to 1,403.99, 1,937.49 and 774.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.99 : 1,937.49 = 774.50 : x
2. Step 2: Convert to fraction form
   1,403.99/1,937.49 = 774.50/x
3. Step 3: Cross multiply
   1,403.99x = 1,937.49 × 774.50
4. Step 4: Simplify right side
   1,403.99x = 1,500,586.01
5. Step 5: Solve for x
   x = 1,500,586.01/1,403.99
6. Step 6: Final answer
   x = 1,068.80