Finding the Fourth Proportional to 63,968.10, 89,438.70 and 63,968.10

Step by Step Solution

1. Step 1: Write the proportion equation
   63,968.10 : 89,438.70 = 63,968.10 : x
2. Step 2: Convert to fraction form
   63,968.10/89,438.70 = 63,968.10/x
3. Step 3: Cross multiply
   63,968.10x = 89,438.70 × 63,968.10
4. Step 4: Simplify right side
   63,968.10x = 5,721,223,705.47
5. Step 5: Solve for x
   x = 5,721,223,705.47/63,968.10
6. Step 6: Final answer
   x = 89,438.70