Finding the Fourth Proportional to 115,964.18, 160,026.09 and 65,663.30

Step by Step Solution

1. Step 1: Write the proportion equation
   115,964.18 : 160,026.09 = 65,663.30 : x
2. Step 2: Convert to fraction form
   115,964.18/160,026.09 = 65,663.30/x
3. Step 3: Cross multiply
   115,964.18x = 160,026.09 × 65,663.30
4. Step 4: Simplify right side
   115,964.18x = 10,507,841,155.50
5. Step 5: Solve for x
   x = 10,507,841,155.50/115,964.18
6. Step 6: Final answer
   x = 90,612.82