Finding the Fourth Proportional to 105,103.15, 145,042.59 and 59,780.14

Step by Step Solution

1. Step 1: Write the proportion equation
   105,103.15 : 145,042.59 = 59,780.14 : x
2. Step 2: Convert to fraction form
   105,103.15/145,042.59 = 59,780.14/x
3. Step 3: Cross multiply
   105,103.15x = 145,042.59 × 59,780.14
4. Step 4: Simplify right side
   105,103.15x = 8,670,666,336.16
5. Step 5: Solve for x
   x = 8,670,666,336.16/105,103.15
6. Step 6: Final answer
   x = 82,496.73