Finding the Fourth Proportional to 2,218.58, 3,061.62 and 1,210.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.58 : 3,061.62 = 1,210.34 : x
2. Step 2: Convert to fraction form
   2,218.58/3,061.62 = 1,210.34/x
3. Step 3: Cross multiply
   2,218.58x = 3,061.62 × 1,210.34
4. Step 4: Simplify right side
   2,218.58x = 3,705,601.15
5. Step 5: Solve for x
   x = 3,705,601.15/2,218.58
6. Step 6: Final answer
   x = 1,670.26