Finding the Fourth Proportional to 12,730.16, 19,090.20 and 3,842.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,730.16 : 19,090.20 = 3,842.72 : x
2. Step 2: Convert to fraction form
   12,730.16/19,090.20 = 3,842.72/x
3. Step 3: Cross multiply
   12,730.16x = 19,090.20 × 3,842.72
4. Step 4: Simplify right side
   12,730.16x = 73,358,293.34
5. Step 5: Solve for x
   x = 73,358,293.34/12,730.16
6. Step 6: Final answer
   x = 5,762.56