Finding the Fourth Proportional to 105,059.53, 144,978.96 and 59,121.73

Step by Step Solution

1. Step 1: Write the proportion equation
   105,059.53 : 144,978.96 = 59,121.73 : x
2. Step 2: Convert to fraction form
   105,059.53/144,978.96 = 59,121.73/x
3. Step 3: Cross multiply
   105,059.53x = 144,978.96 × 59,121.73
4. Step 4: Simplify right side
   105,059.53x = 8,571,406,928.80
5. Step 5: Solve for x
   x = 8,571,406,928.80/105,059.53
6. Step 6: Final answer
   x = 81,586.19