Finding the Fourth Proportional to 1,400.08, 1,931.98 and 810.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.08 : 1,931.98 = 810.61 : x
2. Step 2: Convert to fraction form
   1,400.08/1,931.98 = 810.61/x
3. Step 3: Cross multiply
   1,400.08x = 1,931.98 × 810.61
4. Step 4: Simplify right side
   1,400.08x = 1,566,082.31
5. Step 5: Solve for x
   x = 1,566,082.31/1,400.08
6. Step 6: Final answer
   x = 1,118.57