Finding the Fourth Proportional to 67,809.02, 101,712.17 and 21,061.76

Step by Step Solution

1. Step 1: Write the proportion equation
   67,809.02 : 101,712.17 = 21,061.76 : x
2. Step 2: Convert to fraction form
   67,809.02/101,712.17 = 21,061.76/x
3. Step 3: Cross multiply
   67,809.02x = 101,712.17 × 21,061.76
4. Step 4: Simplify right side
   67,809.02x = 2,142,236,857.71
5. Step 5: Solve for x
   x = 2,142,236,857.71/67,809.02
6. Step 6: Final answer
   x = 31,592.21