Finding the Fourth Proportional to 105,134.02, 157,424.55 and 80,527.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,134.02 : 157,424.55 = 80,527.30 : x
2. Step 2: Convert to fraction form
   105,134.02/157,424.55 = 80,527.30/x
3. Step 3: Cross multiply
   105,134.02x = 157,424.55 × 80,527.30
4. Step 4: Simplify right side
   105,134.02x = 12,676,973,965.22
5. Step 5: Solve for x
   x = 12,676,973,965.22/105,134.02
6. Step 6: Final answer
   x = 120,579.18