Finding the Fourth Proportional to 3,663.88, 5,056.22 and 1,985.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,663.88 : 5,056.22 = 1,985.32 : x
2. Step 2: Convert to fraction form
   3,663.88/5,056.22 = 1,985.32/x
3. Step 3: Cross multiply
   3,663.88x = 5,056.22 × 1,985.32
4. Step 4: Simplify right side
   3,663.88x = 10,038,214.69
5. Step 5: Solve for x
   x = 10,038,214.69/3,663.88
6. Step 6: Final answer
   x = 2,739.78