Finding the Fourth Proportional to 34,982.72, 52,448.16 and 21,128.48

Step by Step Solution

1. Step 1: Write the proportion equation
   34,982.72 : 52,448.16 = 21,128.48 : x
2. Step 2: Convert to fraction form
   34,982.72/52,448.16 = 21,128.48/x
3. Step 3: Cross multiply
   34,982.72x = 52,448.16 × 21,128.48
4. Step 4: Simplify right side
   34,982.72x = 1,108,149,899.60
5. Step 5: Solve for x
   x = 1,108,149,899.60/34,982.72
6. Step 6: Final answer
   x = 31,677.07