Finding the Fourth Proportional to 2,886.59, 4,330.34 and 1,243.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,886.59 : 4,330.34 = 1,243.60 : x
2. Step 2: Convert to fraction form
   2,886.59/4,330.34 = 1,243.60/x
3. Step 3: Cross multiply
   2,886.59x = 4,330.34 × 1,243.60
4. Step 4: Simplify right side
   2,886.59x = 5,385,219.30
5. Step 5: Solve for x
   x = 5,385,219.30/2,886.59
6. Step 6: Final answer
   x = 1,865.60