Finding the Fourth Proportional to 2,225.61, 3,070.98 and 1,386.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.61 : 3,070.98 = 1,386.18 : x
2. Step 2: Convert to fraction form
   2,225.61/3,070.98 = 1,386.18/x
3. Step 3: Cross multiply
   2,225.61x = 3,070.98 × 1,386.18
4. Step 4: Simplify right side
   2,225.61x = 4,256,931.06
5. Step 5: Solve for x
   x = 4,256,931.06/2,225.61
6. Step 6: Final answer
   x = 1,912.70