Finding the Fourth Proportional to 1,458.42, 2,178.98 and 1,445.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,458.42 : 2,178.98 = 1,445.46 : x
2. Step 2: Convert to fraction form
   1,458.42/2,178.98 = 1,445.46/x
3. Step 3: Cross multiply
   1,458.42x = 2,178.98 × 1,445.46
4. Step 4: Simplify right side
   1,458.42x = 3,149,621.20
5. Step 5: Solve for x
   x = 3,149,621.20/1,458.42
6. Step 6: Final answer
   x = 2,159.61