Finding the Fourth Proportional to 3,663.98, 5,056.28 and 1,985.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,663.98 : 5,056.28 = 1,985.43 : x
2. Step 2: Convert to fraction form
   3,663.98/5,056.28 = 1,985.43/x
3. Step 3: Cross multiply
   3,663.98x = 5,056.28 × 1,985.43
4. Step 4: Simplify right side
   3,663.98x = 10,038,890.00
5. Step 5: Solve for x
   x = 10,038,890.00/3,663.98
6. Step 6: Final answer
   x = 2,739.89