Finding the Fourth Proportional to 1,781.73, 2,459.93 and 1,222.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.73 : 2,459.93 = 1,222.02 : x
2. Step 2: Convert to fraction form
   1,781.73/2,459.93 = 1,222.02/x
3. Step 3: Cross multiply
   1,781.73x = 2,459.93 × 1,222.02
4. Step 4: Simplify right side
   1,781.73x = 3,006,077.55
5. Step 5: Solve for x
   x = 3,006,077.55/1,781.73
6. Step 6: Final answer
   x = 1,687.17