Finding the Fourth Proportional to 42,907.12, 64,357.49 and 21,834.01

Step by Step Solution

1. Step 1: Write the proportion equation
   42,907.12 : 64,357.49 = 21,834.01 : x
2. Step 2: Convert to fraction form
   42,907.12/64,357.49 = 21,834.01/x
3. Step 3: Cross multiply
   42,907.12x = 64,357.49 × 21,834.01
4. Step 4: Simplify right side
   42,907.12x = 1,405,181,730.44
5. Step 5: Solve for x
   x = 1,405,181,730.44/42,907.12
6. Step 6: Final answer
   x = 32,749.39