Finding the Fourth Proportional to 115,018.80, 158,715.04 and 64,714.56

Step by Step Solution

1. Step 1: Write the proportion equation
   115,018.80 : 158,715.04 = 64,714.56 : x
2. Step 2: Convert to fraction form
   115,018.80/158,715.04 = 64,714.56/x
3. Step 3: Cross multiply
   115,018.80x = 158,715.04 × 64,714.56
4. Step 4: Simplify right side
   115,018.80x = 10,271,173,978.98
5. Step 5: Solve for x
   x = 10,271,173,978.98/115,018.80
6. Step 6: Final answer
   x = 89,299.96