Finding the Fourth Proportional to 2,222.61, 3,066.53 and 1,290.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.61 : 3,066.53 = 1,290.93 : x
2. Step 2: Convert to fraction form
   2,222.61/3,066.53 = 1,290.93/x
3. Step 3: Cross multiply
   2,222.61x = 3,066.53 × 1,290.93
4. Step 4: Simplify right side
   2,222.61x = 3,958,669.12
5. Step 5: Solve for x
   x = 3,958,669.12/2,222.61
6. Step 6: Final answer
   x = 1,781.09