Finding the Fourth Proportional to 13,066.81, 18,031.98 and 7,098.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,066.81 : 18,031.98 = 7,098.57 : x
2. Step 2: Convert to fraction form
   13,066.81/18,031.98 = 7,098.57/x
3. Step 3: Cross multiply
   13,066.81x = 18,031.98 × 7,098.57
4. Step 4: Simplify right side
   13,066.81x = 128,001,272.27
5. Step 5: Solve for x
   x = 128,001,272.27/13,066.81
6. Step 6: Final answer
   x = 9,795.91