Finding the Fourth Proportional to 105,387.67, 145,405.69 and 62,930.71

Step by Step Solution

1. Step 1: Write the proportion equation
   105,387.67 : 145,405.69 = 62,930.71 : x
2. Step 2: Convert to fraction form
   105,387.67/145,405.69 = 62,930.71/x
3. Step 3: Cross multiply
   105,387.67x = 145,405.69 × 62,930.71
4. Step 4: Simplify right side
   105,387.67x = 9,150,483,309.74
5. Step 5: Solve for x
   x = 9,150,483,309.74/105,387.67
6. Step 6: Final answer
   x = 86,826.89