Finding the Fourth Proportional to 21,293.10, 29,384.91 and 12,343.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,293.10 : 29,384.91 = 12,343.50 : x
2. Step 2: Convert to fraction form
   21,293.10/29,384.91 = 12,343.50/x
3. Step 3: Cross multiply
   21,293.10x = 29,384.91 × 12,343.50
4. Step 4: Simplify right side
   21,293.10x = 362,712,636.59
5. Step 5: Solve for x
   x = 362,712,636.59/21,293.10
6. Step 6: Final answer
   x = 17,034.28