Finding the Third Proportional to 21,210.75 and 34,915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,210.75 : 34,915.50 = 34,915.50 : x
2. Step 2: Convert to fraction form
   21,210.75/34,915.50 = 34,915.50/x
3. Step 3: Cross multiply
   21,210.75x = 34,915.50 × 34,915.50
4. Step 4: Simplify right side
   21,210.75x = 1,219,092,140.25
5. Step 5: Solve for x
   x = 1,219,092,140.25/21,210.75
6. Step 6: Final answer
   x = 57,475.20