Finding the Fourth Proportional to 1,485.50, 2,050.38 and 856.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.50 : 2,050.38 = 856.10 : x
2. Step 2: Convert to fraction form
   1,485.50/2,050.38 = 856.10/x
3. Step 3: Cross multiply
   1,485.50x = 2,050.38 × 856.10
4. Step 4: Simplify right side
   1,485.50x = 1,755,330.32
5. Step 5: Solve for x
   x = 1,755,330.32/1,485.50
6. Step 6: Final answer
   x = 1,181.64