Finding the Fourth Proportional to 115,266.78, 159,061.98 and 64,284.72

Step by Step Solution

1. Step 1: Write the proportion equation
   115,266.78 : 159,061.98 = 64,284.72 : x
2. Step 2: Convert to fraction form
   115,266.78/159,061.98 = 64,284.72/x
3. Step 3: Cross multiply
   115,266.78x = 159,061.98 × 64,284.72
4. Step 4: Simplify right side
   115,266.78x = 10,225,254,846.95
5. Step 5: Solve for x
   x = 10,225,254,846.95/115,266.78
6. Step 6: Final answer
   x = 88,709.47