Finding the Fourth Proportional to 13,091.95, 18,066.93 and 7,123.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,091.95 : 18,066.93 = 7,123.62 : x
2. Step 2: Convert to fraction form
   13,091.95/18,066.93 = 7,123.62/x
3. Step 3: Cross multiply
   13,091.95x = 18,066.93 × 7,123.62
4. Step 4: Simplify right side
   13,091.95x = 128,701,943.89
5. Step 5: Solve for x
   x = 128,701,943.89/13,091.95
6. Step 6: Final answer
   x = 9,830.62