Finding the Fourth Proportional to 12,379.29, 17,090.06 and 9,561.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,379.29 : 17,090.06 = 9,561.25 : x
2. Step 2: Convert to fraction form
   12,379.29/17,090.06 = 9,561.25/x
3. Step 3: Cross multiply
   12,379.29x = 17,090.06 × 9,561.25
4. Step 4: Simplify right side
   12,379.29x = 163,402,312.27
5. Step 5: Solve for x
   x = 163,402,312.27/12,379.29
6. Step 6: Final answer
   x = 13,199.65