Finding the Fourth Proportional to 21,329.25, 29,430.72 and 12,374.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,329.25 : 29,430.72 = 12,374.70 : x
2. Step 2: Convert to fraction form
   21,329.25/29,430.72 = 12,374.70/x
3. Step 3: Cross multiply
   21,329.25x = 29,430.72 × 12,374.70
4. Step 4: Simplify right side
   21,329.25x = 364,196,330.78
5. Step 5: Solve for x
   x = 364,196,330.78/21,329.25
6. Step 6: Final answer
   x = 17,074.97