Finding the Fourth Proportional to 105,314.15, 145,316.56 and 59,993.03

Step by Step Solution

1. Step 1: Write the proportion equation
   105,314.15 : 145,316.56 = 59,993.03 : x
2. Step 2: Convert to fraction form
   105,314.15/145,316.56 = 59,993.03/x
3. Step 3: Cross multiply
   105,314.15x = 145,316.56 × 59,993.03
4. Step 4: Simplify right side
   105,314.15x = 8,717,980,743.58
5. Step 5: Solve for x
   x = 8,717,980,743.58/105,314.15
6. Step 6: Final answer
   x = 82,780.72