Finding the Fourth Proportional to 12,109.56, 16,713.16 and 10,089.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,109.56 : 16,713.16 = 10,089.76 : x
2. Step 2: Convert to fraction form
   12,109.56/16,713.16 = 10,089.76/x
3. Step 3: Cross multiply
   12,109.56x = 16,713.16 × 10,089.76
4. Step 4: Simplify right side
   12,109.56x = 168,631,773.24
5. Step 5: Solve for x
   x = 168,631,773.24/12,109.56
6. Step 6: Final answer
   x = 13,925.51