Finding the Fourth Proportional to 115,099.84, 158,836.24 and 64,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   115,099.84 : 158,836.24 = 64,111.20 : x
2. Step 2: Convert to fraction form
   115,099.84/158,836.24 = 64,111.20/x
3. Step 3: Cross multiply
   115,099.84x = 158,836.24 × 64,111.20
4. Step 4: Simplify right side
   115,099.84x = 10,183,181,949.89
5. Step 5: Solve for x
   x = 10,183,181,949.89/115,099.84
6. Step 6: Final answer
   x = 88,472.60