Finding the Fourth Proportional to 42,642.66, 64,003.38 and 21,597.49

Step by Step Solution

1. Step 1: Write the proportion equation
   42,642.66 : 64,003.38 = 21,597.49 : x
2. Step 2: Convert to fraction form
   42,642.66/64,003.38 = 21,597.49/x
3. Step 3: Cross multiply
   42,642.66x = 64,003.38 × 21,597.49
4. Step 4: Simplify right side
   42,642.66x = 1,382,312,480.02
5. Step 5: Solve for x
   x = 1,382,312,480.02/42,642.66
6. Step 6: Final answer
   x = 32,416.19