Finding the Fourth Proportional to 12,933.12, 19,402.20 and 4,613.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,933.12 : 19,402.20 = 4,613.76 : x
2. Step 2: Convert to fraction form
   12,933.12/19,402.20 = 4,613.76/x
3. Step 3: Cross multiply
   12,933.12x = 19,402.20 × 4,613.76
4. Step 4: Simplify right side
   12,933.12x = 89,517,094.27
5. Step 5: Solve for x
   x = 89,517,094.27/12,933.12
6. Step 6: Final answer
   x = 6,921.54