Finding the Fourth Proportional to 67,918.02, 101,872.17 and 21,169.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,918.02 : 101,872.17 = 21,169.50 : x
2. Step 2: Convert to fraction form
   67,918.02/101,872.17 = 21,169.50/x
3. Step 3: Cross multiply
   67,918.02x = 101,872.17 × 21,169.50
4. Step 4: Simplify right side
   67,918.02x = 2,156,582,902.82
5. Step 5: Solve for x
   x = 2,156,582,902.82/67,918.02
6. Step 6: Final answer
   x = 31,752.74