Finding the Fourth Proportional to 3,627.50, 5,445.10 and 3,213.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,627.50 : 5,445.10 = 3,213.72 : x
2. Step 2: Convert to fraction form
   3,627.50/5,445.10 = 3,213.72/x
3. Step 3: Cross multiply
   3,627.50x = 5,445.10 × 3,213.72
4. Step 4: Simplify right side
   3,627.50x = 17,499,026.77
5. Step 5: Solve for x
   x = 17,499,026.77/3,627.50
6. Step 6: Final answer
   x = 4,823.99