Finding the Fourth Proportional to 2,919.59, 4,030.50 and 1,858.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,919.59 : 4,030.50 = 1,858.42 : x
2. Step 2: Convert to fraction form
   2,919.59/4,030.50 = 1,858.42/x
3. Step 3: Cross multiply
   2,919.59x = 4,030.50 × 1,858.42
4. Step 4: Simplify right side
   2,919.59x = 7,490,361.81
5. Step 5: Solve for x
   x = 7,490,361.81/2,919.59
6. Step 6: Final answer
   x = 2,565.55