Finding the Fourth Proportional to 12,196.76, 18,301.28 and 5,178.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.76 : 18,301.28 = 5,178.56 : x
2. Step 2: Convert to fraction form
   12,196.76/18,301.28 = 5,178.56/x
3. Step 3: Cross multiply
   12,196.76x = 18,301.28 × 5,178.56
4. Step 4: Simplify right side
   12,196.76x = 94,774,276.56
5. Step 5: Solve for x
   x = 94,774,276.56/12,196.76
6. Step 6: Final answer
   x = 7,770.45