Finding the Fourth Proportional to 105,726.51, 145,862.55 and 67,487.49

Step by Step Solution

1. Step 1: Write the proportion equation
   105,726.51 : 145,862.55 = 67,487.49 : x
2. Step 2: Convert to fraction form
   105,726.51/145,862.55 = 67,487.49/x
3. Step 3: Cross multiply
   105,726.51x = 145,862.55 × 67,487.49
4. Step 4: Simplify right side
   105,726.51x = 9,843,897,384.50
5. Step 5: Solve for x
   x = 9,843,897,384.50/105,726.51
6. Step 6: Final answer
   x = 93,107.18