Finding the Fourth Proportional to 1,697.86, 2,545.20 and 760.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,697.86 : 2,545.20 = 760.30 : x
2. Step 2: Convert to fraction form
   1,697.86/2,545.20 = 760.30/x
3. Step 3: Cross multiply
   1,697.86x = 2,545.20 × 760.30
4. Step 4: Simplify right side
   1,697.86x = 1,935,115.56
5. Step 5: Solve for x
   x = 1,935,115.56/1,697.86
6. Step 6: Final answer
   x = 1,139.74