Finding the Fourth Proportional to 21,048.72, 29,034.54 and 12,547.68

Step by Step Solution

1. Step 1: Write the proportion equation
   21,048.72 : 29,034.54 = 12,547.68 : x
2. Step 2: Convert to fraction form
   21,048.72/29,034.54 = 12,547.68/x
3. Step 3: Cross multiply
   21,048.72x = 29,034.54 × 12,547.68
4. Step 4: Simplify right side
   21,048.72x = 364,316,116.87
5. Step 5: Solve for x
   x = 364,316,116.87/21,048.72
6. Step 6: Final answer
   x = 17,308.23