Finding the Fourth Proportional to 42,911.22, 64,262.90 and 21,795.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,911.22 : 64,262.90 = 21,795.72 : x
2. Step 2: Convert to fraction form
   42,911.22/64,262.90 = 21,795.72/x
3. Step 3: Cross multiply
   42,911.22x = 64,262.90 × 21,795.72
4. Step 4: Simplify right side
   42,911.22x = 1,400,656,174.79
5. Step 5: Solve for x
   x = 1,400,656,174.79/42,911.22
6. Step 6: Final answer
   x = 32,640.79