Finding the Fourth Proportional to 49,108.72, 73,643.52 and 21,042.16

Step by Step Solution

1. Step 1: Write the proportion equation
   49,108.72 : 73,643.52 = 21,042.16 : x
2. Step 2: Convert to fraction form
   49,108.72/73,643.52 = 21,042.16/x
3. Step 3: Cross multiply
   49,108.72x = 73,643.52 × 21,042.16
4. Step 4: Simplify right side
   49,108.72x = 1,549,618,730.80
5. Step 5: Solve for x
   x = 1,549,618,730.80/49,108.72
6. Step 6: Final answer
   x = 31,554.86