Finding the Fourth Proportional to 3,188.09, 4,784.34 and 1,240.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,188.09 : 4,784.34 = 1,240.31 : x
2. Step 2: Convert to fraction form
   3,188.09/4,784.34 = 1,240.31/x
3. Step 3: Cross multiply
   3,188.09x = 4,784.34 × 1,240.31
4. Step 4: Simplify right side
   3,188.09x = 5,934,064.75
5. Step 5: Solve for x
   x = 5,934,064.75/3,188.09
6. Step 6: Final answer
   x = 1,861.32