Finding the Fourth Proportional to 12,200.63, 18,300.61 and 3,881.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.63 : 18,300.61 = 3,881.15 : x
2. Step 2: Convert to fraction form
   12,200.63/18,300.61 = 3,881.15/x
3. Step 3: Cross multiply
   12,200.63x = 18,300.61 × 3,881.15
4. Step 4: Simplify right side
   12,200.63x = 71,027,301.59
5. Step 5: Solve for x
   x = 71,027,301.59/12,200.63
6. Step 6: Final answer
   x = 5,821.61