Finding the Fourth Proportional to 1,367.08, 1,886.55 and 777.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.08 : 1,886.55 = 777.61 : x
2. Step 2: Convert to fraction form
   1,367.08/1,886.55 = 777.61/x
3. Step 3: Cross multiply
   1,367.08x = 1,886.55 × 777.61
4. Step 4: Simplify right side
   1,367.08x = 1,467,000.15
5. Step 5: Solve for x
   x = 1,467,000.15/1,367.08
6. Step 6: Final answer
   x = 1,073.09