Finding the Fourth Proportional to 13,091.63, 18,066.29 and 7,123.19

Step by Step Solution

1. Step 1: Write the proportion equation
   13,091.63 : 18,066.29 = 7,123.19 : x
2. Step 2: Convert to fraction form
   13,091.63/18,066.29 = 7,123.19/x
3. Step 3: Cross multiply
   13,091.63x = 18,066.29 × 7,123.19
4. Step 4: Simplify right side
   13,091.63x = 128,689,632.01
5. Step 5: Solve for x
   x = 128,689,632.01/13,091.63
6. Step 6: Final answer
   x = 9,829.92