Finding the Fourth Proportional to 8,061.47, 12,089.90 and 3,130.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,061.47 : 12,089.90 = 3,130.05 : x
2. Step 2: Convert to fraction form
   8,061.47/12,089.90 = 3,130.05/x
3. Step 3: Cross multiply
   8,061.47x = 12,089.90 × 3,130.05
4. Step 4: Simplify right side
   8,061.47x = 37,841,999.32
5. Step 5: Solve for x
   x = 37,841,999.32/8,061.47
6. Step 6: Final answer
   x = 4,694.18