Finding the Fourth Proportional to 13,090.65, 18,064.17 and 7,784.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,090.65 : 18,064.17 = 7,784.49 : x
2. Step 2: Convert to fraction form
   13,090.65/18,064.17 = 7,784.49/x
3. Step 3: Cross multiply
   13,090.65x = 18,064.17 × 7,784.49
4. Step 4: Simplify right side
   13,090.65x = 140,620,350.72
5. Step 5: Solve for x
   x = 140,620,350.72/13,090.65
6. Step 6: Final answer
   x = 10,742.04