Finding the Fourth Proportional to 49,108.88, 73,662.82 and 21,005.12

Step by Step Solution

1. Step 1: Write the proportion equation
   49,108.88 : 73,662.82 = 21,005.12 : x
2. Step 2: Convert to fraction form
   49,108.88/73,662.82 = 21,005.12/x
3. Step 3: Cross multiply
   49,108.88x = 73,662.82 × 21,005.12
4. Step 4: Simplify right side
   49,108.88x = 1,547,296,505.28
5. Step 5: Solve for x
   x = 1,547,296,505.28/49,108.88
6. Step 6: Final answer
   x = 31,507.47