Finding the Fourth Proportional to 115,400.12, 159,256.98 and 65,099

Step by Step Solution

1. Step 1: Write the proportion equation
   115,400.12 : 159,256.98 = 65,099 : x
2. Step 2: Convert to fraction form
   115,400.12/159,256.98 = 65,099/x
3. Step 3: Cross multiply
   115,400.12x = 159,256.98 × 65,099
4. Step 4: Simplify right side
   115,400.12x = 10,367,470,141.02
5. Step 5: Solve for x
   x = 10,367,470,141.02/115,400.12
6. Step 6: Final answer
   x = 89,839.34