Finding the Fourth Proportional to 115,143.76, 158,900.70 and 64,153.72

Step by Step Solution

1. Step 1: Write the proportion equation
   115,143.76 : 158,900.70 = 64,153.72 : x
2. Step 2: Convert to fraction form
   115,143.76/158,900.70 = 64,153.72/x
3. Step 3: Cross multiply
   115,143.76x = 158,900.70 × 64,153.72
4. Step 4: Simplify right side
   115,143.76x = 10,194,071,015.60
5. Step 5: Solve for x
   x = 10,194,071,015.60/115,143.76
6. Step 6: Final answer
   x = 88,533.42