Finding the Fourth Proportional to 60,672.36, 90,990.72 and 21,222.12

Step by Step Solution

1. Step 1: Write the proportion equation
   60,672.36 : 90,990.72 = 21,222.12 : x
2. Step 2: Convert to fraction form
   60,672.36/90,990.72 = 21,222.12/x
3. Step 3: Cross multiply
   60,672.36x = 90,990.72 × 21,222.12
4. Step 4: Simplify right side
   60,672.36x = 1,931,015,978.73
5. Step 5: Solve for x
   x = 1,931,015,978.73/60,672.36
6. Step 6: Final answer
   x = 31,826.95