Finding the Fourth Proportional to 10,213.74, 15,316.83 and 3,638.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,213.74 : 15,316.83 = 3,638.18 : x
2. Step 2: Convert to fraction form
   10,213.74/15,316.83 = 3,638.18/x
3. Step 3: Cross multiply
   10,213.74x = 15,316.83 × 3,638.18
4. Step 4: Simplify right side
   10,213.74x = 55,725,384.57
5. Step 5: Solve for x
   x = 55,725,384.57/10,213.74
6. Step 6: Final answer
   x = 5,455.92