Finding the Fourth Proportional to 105,978.73, 146,250.61 and 58,235.15

Step by Step Solution

1. Step 1: Write the proportion equation
   105,978.73 : 146,250.61 = 58,235.15 : x
2. Step 2: Convert to fraction form
   105,978.73/146,250.61 = 58,235.15/x
3. Step 3: Cross multiply
   105,978.73x = 146,250.61 × 58,235.15
4. Step 4: Simplify right side
   105,978.73x = 8,516,926,758.55
5. Step 5: Solve for x
   x = 8,516,926,758.55/105,978.73
6. Step 6: Final answer
   x = 80,364.49