Finding the Fourth Proportional to 1,300.15, 1,793.50 and 776.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.15 : 1,793.50 = 776.08 : x
2. Step 2: Convert to fraction form
   1,300.15/1,793.50 = 776.08/x
3. Step 3: Cross multiply
   1,300.15x = 1,793.50 × 776.08
4. Step 4: Simplify right side
   1,300.15x = 1,391,899.48
5. Step 5: Solve for x
   x = 1,391,899.48/1,300.15
6. Step 6: Final answer
   x = 1,070.57