Finding the Fourth Proportional to 4,782.39, 7,171.55 and 1,858.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,782.39 : 7,171.55 = 1,858.69 : x
2. Step 2: Convert to fraction form
   4,782.39/7,171.55 = 1,858.69/x
3. Step 3: Cross multiply
   4,782.39x = 7,171.55 × 1,858.69
4. Step 4: Simplify right side
   4,782.39x = 13,329,688.27
5. Step 5: Solve for x
   x = 13,329,688.27/4,782.39
6. Step 6: Final answer
   x = 2,787.25