Finding the Fourth Proportional to 1,461.33, 2,188.52 and 810.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,461.33 : 2,188.52 = 810.45 : x
2. Step 2: Convert to fraction form
   1,461.33/2,188.52 = 810.45/x
3. Step 3: Cross multiply
   1,461.33x = 2,188.52 × 810.45
4. Step 4: Simplify right side
   1,461.33x = 1,773,681.98
5. Step 5: Solve for x
   x = 1,773,681.98/1,461.33
6. Step 6: Final answer
   x = 1,213.75