Finding the Fourth Proportional to 64,815.89, 89,445.93 and 35,007.89

Step by Step Solution

1. Step 1: Write the proportion equation
   64,815.89 : 89,445.93 = 35,007.89 : x
2. Step 2: Convert to fraction form
   64,815.89/89,445.93 = 35,007.89/x
3. Step 3: Cross multiply
   64,815.89x = 89,445.93 × 35,007.89
4. Step 4: Simplify right side
   64,815.89x = 3,131,313,278.39
5. Step 5: Solve for x
   x = 3,131,313,278.39/64,815.89
6. Step 6: Final answer
   x = 48,310.89