Finding the Fourth Proportional to 29,200.47, 43,640.69 and 21,319.59

Step by Step Solution

1. Step 1: Write the proportion equation
   29,200.47 : 43,640.69 = 21,319.59 : x
2. Step 2: Convert to fraction form
   29,200.47/43,640.69 = 21,319.59/x
3. Step 3: Cross multiply
   29,200.47x = 43,640.69 × 21,319.59
4. Step 4: Simplify right side
   29,200.47x = 930,401,511.52
5. Step 5: Solve for x
   x = 930,401,511.52/29,200.47
6. Step 6: Final answer
   x = 31,862.55