Finding the Fourth Proportional to 105,390.31, 145,443.95 and 62,394.47

Step by Step Solution

1. Step 1: Write the proportion equation
   105,390.31 : 145,443.95 = 62,394.47 : x
2. Step 2: Convert to fraction form
   105,390.31/145,443.95 = 62,394.47/x
3. Step 3: Cross multiply
   105,390.31x = 145,443.95 × 62,394.47
4. Step 4: Simplify right side
   105,390.31x = 9,074,898,460.57
5. Step 5: Solve for x
   x = 9,074,898,460.57/105,390.31
6. Step 6: Final answer
   x = 86,107.52