Finding the Fourth Proportional to 13,126.23, 18,113.76 and 7,818.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,126.23 : 18,113.76 = 7,818.30 : x
2. Step 2: Convert to fraction form
   13,126.23/18,113.76 = 7,818.30/x
3. Step 3: Cross multiply
   13,126.23x = 18,113.76 × 7,818.30
4. Step 4: Simplify right side
   13,126.23x = 141,618,809.81
5. Step 5: Solve for x
   x = 141,618,809.81/13,126.23
6. Step 6: Final answer
   x = 10,788.99