Finding the Fourth Proportional to 64,820, 89,451.60 and 35,012

Step by Step Solution

1. Step 1: Write the proportion equation
   64,820 : 89,451.60 = 35,012 : x
2. Step 2: Convert to fraction form
   64,820/89,451.60 = 35,012/x
3. Step 3: Cross multiply
   64,820x = 89,451.60 × 35,012
4. Step 4: Simplify right side
   64,820x = 3,131,879,419.20
5. Step 5: Solve for x
   x = 3,131,879,419.20/64,820
6. Step 6: Final answer
   x = 48,316.56