Finding the Fourth Proportional to 12,061.38, 18,090.16 and 7,379.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,061.38 : 18,090.16 = 7,379.76 : x
2. Step 2: Convert to fraction form
   12,061.38/18,090.16 = 7,379.76/x
3. Step 3: Cross multiply
   12,061.38x = 18,090.16 × 7,379.76
4. Step 4: Simplify right side
   12,061.38x = 133,501,039.16
5. Step 5: Solve for x
   x = 133,501,039.16/12,061.38
6. Step 6: Final answer
   x = 11,068.47