Finding the Fourth Proportional to 1,298.02, 1,943.55 and 810.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.02 : 1,943.55 = 810.10 : x
2. Step 2: Convert to fraction form
   1,298.02/1,943.55 = 810.10/x
3. Step 3: Cross multiply
   1,298.02x = 1,943.55 × 810.10
4. Step 4: Simplify right side
   1,298.02x = 1,574,469.86
5. Step 5: Solve for x
   x = 1,574,469.86/1,298.02
6. Step 6: Final answer
   x = 1,212.98