Finding the Fourth Proportional to 105,570, 145,690.92 and 60,858

Step by Step Solution

1. Step 1: Write the proportion equation
   105,570 : 145,690.92 = 60,858 : x
2. Step 2: Convert to fraction form
   105,570/145,690.92 = 60,858/x
3. Step 3: Cross multiply
   105,570x = 145,690.92 × 60,858
4. Step 4: Simplify right side
   105,570x = 8,866,458,009.36
5. Step 5: Solve for x
   x = 8,866,458,009.36/105,570
6. Step 6: Final answer
   x = 83,986.53