Finding the Fourth Proportional to 119,131.56, 164,401.71 and 65,420.04

Step by Step Solution

1. Step 1: Write the proportion equation
   119,131.56 : 164,401.71 = 65,420.04 : x
2. Step 2: Convert to fraction form
   119,131.56/164,401.71 = 65,420.04/x
3. Step 3: Cross multiply
   119,131.56x = 164,401.71 × 65,420.04
4. Step 4: Simplify right side
   119,131.56x = 10,755,166,444.27
5. Step 5: Solve for x
   x = 10,755,166,444.27/119,131.56
6. Step 6: Final answer
   x = 90,279.74