Finding the Fourth Proportional to 42,881.67, 64,361.73 and 21,836.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,881.67 : 64,361.73 = 21,836.25 : x
2. Step 2: Convert to fraction form
   42,881.67/64,361.73 = 21,836.25/x
3. Step 3: Cross multiply
   42,881.67x = 64,361.73 × 21,836.25
4. Step 4: Simplify right side
   42,881.67x = 1,405,418,826.71
5. Step 5: Solve for x
   x = 1,405,418,826.71/42,881.67
6. Step 6: Final answer
   x = 32,774.35