Finding the Fourth Proportional to 105,054.80, 144,919.50 and 71,018.60

Step by Step Solution

1. Step 1: Write the proportion equation
   105,054.80 : 144,919.50 = 71,018.60 : x
2. Step 2: Convert to fraction form
   105,054.80/144,919.50 = 71,018.60/x
3. Step 3: Cross multiply
   105,054.80x = 144,919.50 × 71,018.60
4. Step 4: Simplify right side
   105,054.80x = 10,291,980,002.70
5. Step 5: Solve for x
   x = 10,291,980,002.70/105,054.80
6. Step 6: Final answer
   x = 97,967.73