Finding the Fourth Proportional to 8,061.36, 12,090.60 and 5,130.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,061.36 : 12,090.60 = 5,130.96 : x
2. Step 2: Convert to fraction form
   8,061.36/12,090.60 = 5,130.96/x
3. Step 3: Cross multiply
   8,061.36x = 12,090.60 × 5,130.96
4. Step 4: Simplify right side
   8,061.36x = 62,036,384.98
5. Step 5: Solve for x
   x = 62,036,384.98/8,061.36
6. Step 6: Final answer
   x = 7,695.52