Finding the Fourth Proportional to 105,072.30, 145,046.52 and 62,645.58

Step by Step Solution

1. Step 1: Write the proportion equation
   105,072.30 : 145,046.52 = 62,645.58 : x
2. Step 2: Convert to fraction form
   105,072.30/145,046.52 = 62,645.58/x
3. Step 3: Cross multiply
   105,072.30x = 145,046.52 × 62,645.58
4. Step 4: Simplify right side
   105,072.30x = 9,086,523,372.38
5. Step 5: Solve for x
   x = 9,086,523,372.38/105,072.30
6. Step 6: Final answer
   x = 86,478.77