Finding the Fourth Proportional to 3,188.10, 4,784.34 and 1,240.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,188.10 : 4,784.34 = 1,240.32 : x
2. Step 2: Convert to fraction form
   3,188.10/4,784.34 = 1,240.32/x
3. Step 3: Cross multiply
   3,188.10x = 4,784.34 × 1,240.32
4. Step 4: Simplify right side
   3,188.10x = 5,934,112.59
5. Step 5: Solve for x
   x = 5,934,112.59/3,188.10
6. Step 6: Final answer
   x = 1,861.33