Finding the Fourth Proportional to 119,131.76, 164,391.12 and 65,415.60

Step by Step Solution

1. Step 1: Write the proportion equation
   119,131.76 : 164,391.12 = 65,415.60 : x
2. Step 2: Convert to fraction form
   119,131.76/164,391.12 = 65,415.60/x
3. Step 3: Cross multiply
   119,131.76x = 164,391.12 × 65,415.60
4. Step 4: Simplify right side
   119,131.76x = 10,753,743,749.47
5. Step 5: Solve for x
   x = 10,753,743,749.47/119,131.76
6. Step 6: Final answer
   x = 90,267.65