Finding the Fourth Proportional to 105,763.72, 145,953 and 58,016.20

Step by Step Solution

1. Step 1: Write the proportion equation
   105,763.72 : 145,953 = 58,016.20 : x
2. Step 2: Convert to fraction form
   105,763.72/145,953 = 58,016.20/x
3. Step 3: Cross multiply
   105,763.72x = 145,953 × 58,016.20
4. Step 4: Simplify right side
   105,763.72x = 8,467,638,438.60
5. Step 5: Solve for x
   x = 8,467,638,438.60/105,763.72
6. Step 6: Final answer
   x = 80,061.84