Finding the Fourth Proportional to 67,760.88, 101,654.82 and 21,012

Step by Step Solution

1. Step 1: Write the proportion equation
   67,760.88 : 101,654.82 = 21,012 : x
2. Step 2: Convert to fraction form
   67,760.88/101,654.82 = 21,012/x
3. Step 3: Cross multiply
   67,760.88x = 101,654.82 × 21,012
4. Step 4: Simplify right side
   67,760.88x = 2,135,971,077.84
5. Step 5: Solve for x
   x = 2,135,971,077.84/67,760.88
6. Step 6: Final answer
   x = 31,522.19