Finding the Fourth Proportional to 13,091.19, 18,066.09 and 7,123.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,091.19 : 18,066.09 = 7,123.15 : x
2. Step 2: Convert to fraction form
   13,091.19/18,066.09 = 7,123.15/x
3. Step 3: Cross multiply
   13,091.19x = 18,066.09 × 7,123.15
4. Step 4: Simplify right side
   13,091.19x = 128,687,468.98
5. Step 5: Solve for x
   x = 128,687,468.98/13,091.19
6. Step 6: Final answer
   x = 9,830.08