Finding the Fourth Proportional to 115,300.32, 159,112.32 and 64,999.36

Step by Step Solution

1. Step 1: Write the proportion equation
   115,300.32 : 159,112.32 = 64,999.36 : x
2. Step 2: Convert to fraction form
   115,300.32/159,112.32 = 64,999.36/x
3. Step 3: Cross multiply
   115,300.32x = 159,112.32 × 64,999.36
4. Step 4: Simplify right side
   115,300.32x = 10,342,198,968.12
5. Step 5: Solve for x
   x = 10,342,198,968.12/115,300.32
6. Step 6: Final answer
   x = 89,697.92