Finding the Fourth Proportional to 10,090.61, 15,138.23 and 5,080.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,090.61 : 15,138.23 = 5,080.48 : x
2. Step 2: Convert to fraction form
   10,090.61/15,138.23 = 5,080.48/x
3. Step 3: Cross multiply
   10,090.61x = 15,138.23 × 5,080.48
4. Step 4: Simplify right side
   10,090.61x = 76,909,487.38
5. Step 5: Solve for x
   x = 76,909,487.38/10,090.61
6. Step 6: Final answer
   x = 7,621.88