Finding the Fourth Proportional to 1,337.60, 1,845.65 and 777.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.60 : 1,845.65 = 777.99 : x
2. Step 2: Convert to fraction form
   1,337.60/1,845.65 = 777.99/x
3. Step 3: Cross multiply
   1,337.60x = 1,845.65 × 777.99
4. Step 4: Simplify right side
   1,337.60x = 1,435,897.24
5. Step 5: Solve for x
   x = 1,435,897.24/1,337.60
6. Step 6: Final answer
   x = 1,073.49