Finding the Fourth Proportional to 56,608.25, 84,951.57 and 21,102

Step by Step Solution

1. Step 1: Write the proportion equation
   56,608.25 : 84,951.57 = 21,102 : x
2. Step 2: Convert to fraction form
   56,608.25/84,951.57 = 21,102/x
3. Step 3: Cross multiply
   56,608.25x = 84,951.57 × 21,102
4. Step 4: Simplify right side
   56,608.25x = 1,792,648,109.27
5. Step 5: Solve for x
   x = 1,792,648,109.27/56,608.25
6. Step 6: Final answer
   x = 31,667.61