Finding the Fourth Proportional to 119,320.80, 164,659.55 and 64,871.25

Step by Step Solution

1. Step 1: Write the proportion equation
   119,320.80 : 164,659.55 = 64,871.25 : x
2. Step 2: Convert to fraction form
   119,320.80/164,659.55 = 64,871.25/x
3. Step 3: Cross multiply
   119,320.80x = 164,659.55 × 64,871.25
4. Step 4: Simplify right side
   119,320.80x = 10,681,670,508.58
5. Step 5: Solve for x
   x = 10,681,670,508.58/119,320.80
6. Step 6: Final answer
   x = 89,520.61