Finding the Fourth Proportional to 105,900.35, 146,143.50 and 58,154.70

Step by Step Solution

1. Step 1: Write the proportion equation
   105,900.35 : 146,143.50 = 58,154.70 : x
2. Step 2: Convert to fraction form
   105,900.35/146,143.50 = 58,154.70/x
3. Step 3: Cross multiply
   105,900.35x = 146,143.50 × 58,154.70
4. Step 4: Simplify right side
   105,900.35x = 8,498,931,399.45
5. Step 5: Solve for x
   x = 8,498,931,399.45/105,900.35
6. Step 6: Final answer
   x = 80,254.04