Finding the Fourth Proportional to 67,659.98, 101,499.69 and 20,916.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,659.98 : 101,499.69 = 20,916.50 : x
2. Step 2: Convert to fraction form
   67,659.98/101,499.69 = 20,916.50/x
3. Step 3: Cross multiply
   67,659.98x = 101,499.69 × 20,916.50
4. Step 4: Simplify right side
   67,659.98x = 2,123,018,265.89
5. Step 5: Solve for x
   x = 2,123,018,265.89/67,659.98
6. Step 6: Final answer
   x = 31,377.75