Finding the Fourth Proportional to 13,094.31, 19,641.68 and 12,429.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,094.31 : 19,641.68 = 12,429.71 : x
2. Step 2: Convert to fraction form
   13,094.31/19,641.68 = 12,429.71/x
3. Step 3: Cross multiply
   13,094.31x = 19,641.68 × 12,429.71
4. Step 4: Simplify right side
   13,094.31x = 244,140,225.96
5. Step 5: Solve for x
   x = 244,140,225.96/13,094.31
6. Step 6: Final answer
   x = 18,644.76