Finding the Fourth Proportional to 1,403.47, 1,936.80 and 773.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.47 : 1,936.80 = 773.99 : x
2. Step 2: Convert to fraction form
   1,403.47/1,936.80 = 773.99/x
3. Step 3: Cross multiply
   1,403.47x = 1,936.80 × 773.99
4. Step 4: Simplify right side
   1,403.47x = 1,499,060.32
5. Step 5: Solve for x
   x = 1,499,060.32/1,403.47
6. Step 6: Final answer
   x = 1,068.11