Finding the Fourth Proportional to 42,680.08, 63,934.38 and 21,268.21

Step by Step Solution

1. Step 1: Write the proportion equation
   42,680.08 : 63,934.38 = 21,268.21 : x
2. Step 2: Convert to fraction form
   42,680.08/63,934.38 = 21,268.21/x
3. Step 3: Cross multiply
   42,680.08x = 63,934.38 × 21,268.21
4. Step 4: Simplify right side
   42,680.08x = 1,359,769,820.06
5. Step 5: Solve for x
   x = 1,359,769,820.06/42,680.08
6. Step 6: Final answer
   x = 31,859.59