Finding the Fourth Proportional to 115,299.72, 159,095.34 and 64,989

Step by Step Solution

1. Step 1: Write the proportion equation
   115,299.72 : 159,095.34 = 64,989 : x
2. Step 2: Convert to fraction form
   115,299.72/159,095.34 = 64,989/x
3. Step 3: Cross multiply
   115,299.72x = 159,095.34 × 64,989
4. Step 4: Simplify right side
   115,299.72x = 10,339,447,051.26
5. Step 5: Solve for x
   x = 10,339,447,051.26/115,299.72
6. Step 6: Final answer
   x = 89,674.52