Finding the Fourth Proportional to 35,643.82, 49,185.10 and 21,300.80

Step by Step Solution

1. Step 1: Write the proportion equation
   35,643.82 : 49,185.10 = 21,300.80 : x
2. Step 2: Convert to fraction form
   35,643.82/49,185.10 = 21,300.80/x
3. Step 3: Cross multiply
   35,643.82x = 49,185.10 × 21,300.80
4. Step 4: Simplify right side
   35,643.82x = 1,047,681,758.78
5. Step 5: Solve for x
   x = 1,047,681,758.78/35,643.82
6. Step 6: Final answer
   x = 29,393.09