Finding the Fourth Proportional to 105,501.80, 145,594.20 and 57,754.34

Step by Step Solution

1. Step 1: Write the proportion equation
   105,501.80 : 145,594.20 = 57,754.34 : x
2. Step 2: Convert to fraction form
   105,501.80/145,594.20 = 57,754.34/x
3. Step 3: Cross multiply
   105,501.80x = 145,594.20 × 57,754.34
4. Step 4: Simplify right side
   105,501.80x = 8,408,696,928.83
5. Step 5: Solve for x
   x = 8,408,696,928.83/105,501.80
6. Step 6: Final answer
   x = 79,701.93