Finding the Fourth Proportional to 19,445.76, 29,099.52 and 14,238.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,445.76 : 29,099.52 = 14,238.72 : x
2. Step 2: Convert to fraction form
   19,445.76/29,099.52 = 14,238.72/x
3. Step 3: Cross multiply
   19,445.76x = 29,099.52 × 14,238.72
4. Step 4: Simplify right side
   19,445.76x = 414,339,917.41
5. Step 5: Solve for x
   x = 414,339,917.41/19,445.76
6. Step 6: Final answer
   x = 21,307.47