Finding the Fourth Proportional to 114,987.72, 158,704.94 and 64,686.72

Step by Step Solution

1. Step 1: Write the proportion equation
   114,987.72 : 158,704.94 = 64,686.72 : x
2. Step 2: Convert to fraction form
   114,987.72/158,704.94 = 64,686.72/x
3. Step 3: Cross multiply
   114,987.72x = 158,704.94 × 64,686.72
4. Step 4: Simplify right side
   114,987.72x = 10,266,102,016.40
5. Step 5: Solve for x
   x = 10,266,102,016.40/114,987.72
6. Step 6: Final answer
   x = 89,279.99