Finding the Fourth Proportional to 13,091.73, 18,066.45 and 7,123.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,091.73 : 18,066.45 = 7,123.32 : x
2. Step 2: Convert to fraction form
   13,091.73/18,066.45 = 7,123.32/x
3. Step 3: Cross multiply
   13,091.73x = 18,066.45 × 7,123.32
4. Step 4: Simplify right side
   13,091.73x = 128,693,104.61
5. Step 5: Solve for x
   x = 128,693,104.61/13,091.73
6. Step 6: Final answer
   x = 9,830.11