Finding the Fourth Proportional to 12,921.30, 19,382.56 and 4,601.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921.30 : 19,382.56 = 4,601.39 : x
2. Step 2: Convert to fraction form
   12,921.30/19,382.56 = 4,601.39/x
3. Step 3: Cross multiply
   12,921.30x = 19,382.56 × 4,601.39
4. Step 4: Simplify right side
   12,921.30x = 89,186,609.34
5. Step 5: Solve for x
   x = 89,186,609.34/12,921.30
6. Step 6: Final answer
   x = 6,902.29