Finding the Fourth Proportional to 64,005.20, 89,738.52 and 64,005.20

Step by Step Solution

1. Step 1: Write the proportion equation
   64,005.20 : 89,738.52 = 64,005.20 : x
2. Step 2: Convert to fraction form
   64,005.20/89,738.52 = 64,005.20/x
3. Step 3: Cross multiply
   64,005.20x = 89,738.52 × 64,005.20
4. Step 4: Simplify right side
   64,005.20x = 5,743,731,920.30
5. Step 5: Solve for x
   x = 5,743,731,920.30/64,005.20
6. Step 6: Final answer
   x = 89,738.52