Finding the Fourth Proportional to 60,456.79, 90,701.52 and 21,016.09

Step by Step Solution

1. Step 1: Write the proportion equation
   60,456.79 : 90,701.52 = 21,016.09 : x
2. Step 2: Convert to fraction form
   60,456.79/90,701.52 = 21,016.09/x
3. Step 3: Cross multiply
   60,456.79x = 90,701.52 × 21,016.09
4. Step 4: Simplify right side
   60,456.79x = 1,906,191,307.46
5. Step 5: Solve for x
   x = 1,906,191,307.46/60,456.79
6. Step 6: Final answer
   x = 31,529.81