Finding the Fourth Proportional to 1,858.50, 2,790.92 and 1,650.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.50 : 2,790.92 = 1,650.72 : x
2. Step 2: Convert to fraction form
   1,858.50/2,790.92 = 1,650.72/x
3. Step 3: Cross multiply
   1,858.50x = 2,790.92 × 1,650.72
4. Step 4: Simplify right side
   1,858.50x = 4,607,027.46
5. Step 5: Solve for x
   x = 4,607,027.46/1,858.50
6. Step 6: Final answer
   x = 2,478.90