Finding the Fourth Proportional to 105,274.56, 145,278.72 and 57,527.92

Step by Step Solution

1. Step 1: Write the proportion equation
   105,274.56 : 145,278.72 = 57,527.92 : x
2. Step 2: Convert to fraction form
   105,274.56/145,278.72 = 57,527.92/x
3. Step 3: Cross multiply
   105,274.56x = 145,278.72 × 57,527.92
4. Step 4: Simplify right side
   105,274.56x = 8,357,582,581.86
5. Step 5: Solve for x
   x = 8,357,582,581.86/105,274.56
6. Step 6: Final answer
   x = 79,388.44