Finding the Fourth Proportional to 3,886.02, 5,363.88 and 3,687.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.02 : 5,363.88 = 3,687.62 : x
2. Step 2: Convert to fraction form
   3,886.02/5,363.88 = 3,687.62/x
3. Step 3: Cross multiply
   3,886.02x = 5,363.88 × 3,687.62
4. Step 4: Simplify right side
   3,886.02x = 19,779,951.17
5. Step 5: Solve for x
   x = 19,779,951.17/3,886.02
6. Step 6: Final answer
   x = 5,090.03