Finding the Fourth Proportional to 1,400.10, 1,931.98 and 810.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.10 : 1,931.98 = 810.82 : x
2. Step 2: Convert to fraction form
   1,400.10/1,931.98 = 810.82/x
3. Step 3: Cross multiply
   1,400.10x = 1,931.98 × 810.82
4. Step 4: Simplify right side
   1,400.10x = 1,566,488.02
5. Step 5: Solve for x
   x = 1,566,488.02/1,400.10
6. Step 6: Final answer
   x = 1,118.84