Finding the Fourth Proportional to 105,501.56, 145,594.71 and 57,754.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,501.56 : 145,594.71 = 57,754.76 : x
2. Step 2: Convert to fraction form
   105,501.56/145,594.71 = 57,754.76/x
3. Step 3: Cross multiply
   105,501.56x = 145,594.71 × 57,754.76
4. Step 4: Simplify right side
   105,501.56x = 8,408,786,805.35
5. Step 5: Solve for x
   x = 8,408,786,805.35/105,501.56
6. Step 6: Final answer
   x = 79,702.97