Finding the Fourth Proportional to 12,384.86, 17,090.96 and 7,007.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,384.86 : 17,090.96 = 7,007.20 : x
2. Step 2: Convert to fraction form
   12,384.86/17,090.96 = 7,007.20/x
3. Step 3: Cross multiply
   12,384.86x = 17,090.96 × 7,007.20
4. Step 4: Simplify right side
   12,384.86x = 119,759,749.70
5. Step 5: Solve for x
   x = 119,759,749.70/12,384.86
6. Step 6: Final answer
   x = 9,669.85