Finding the Fourth Proportional to 3,686.01, 5,522.30 and 3,138.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,686.01 : 5,522.30 = 3,138.81 : x
2. Step 2: Convert to fraction form
   3,686.01/5,522.30 = 3,138.81/x
3. Step 3: Cross multiply
   3,686.01x = 5,522.30 × 3,138.81
4. Step 4: Simplify right side
   3,686.01x = 17,333,434.77
5. Step 5: Solve for x
   x = 17,333,434.77/3,686.01
6. Step 6: Final answer
   x = 4,702.49