Finding the Fourth Proportional to 115,704.29, 159,686.72 and 64,719.86

Step by Step Solution

1. Step 1: Write the proportion equation
   115,704.29 : 159,686.72 = 64,719.86 : x
2. Step 2: Convert to fraction form
   115,704.29/159,686.72 = 64,719.86/x
3. Step 3: Cross multiply
   115,704.29x = 159,686.72 × 64,719.86
4. Step 4: Simplify right side
   115,704.29x = 10,334,901,040.23
5. Step 5: Solve for x
   x = 10,334,901,040.23/115,704.29
6. Step 6: Final answer
   x = 89,321.68