Finding the Fourth Proportional to 42,917.24, 64,271.88 and 21,801.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,917.24 : 64,271.88 = 21,801.72 : x
2. Step 2: Convert to fraction form
   42,917.24/64,271.88 = 21,801.72/x
3. Step 3: Cross multiply
   42,917.24x = 64,271.88 × 21,801.72
4. Step 4: Simplify right side
   42,917.24x = 1,401,237,531.63
5. Step 5: Solve for x
   x = 1,401,237,531.63/42,917.24
6. Step 6: Final answer
   x = 32,649.76