Finding the Fourth Proportional to 42,884.67, 64,366.23 and 21,839.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,884.67 : 64,366.23 = 21,839.25 : x
2. Step 2: Convert to fraction form
   42,884.67/64,366.23 = 21,839.25/x
3. Step 3: Cross multiply
   42,884.67x = 64,366.23 × 21,839.25
4. Step 4: Simplify right side
   42,884.67x = 1,405,710,188.53
5. Step 5: Solve for x
   x = 1,405,710,188.53/42,884.67
6. Step 6: Final answer
   x = 32,778.85