Finding the Fourth Proportional to 105,264.24, 145,196.76 and 62,790

Step by Step Solution

1. Step 1: Write the proportion equation
   105,264.24 : 145,196.76 = 62,790 : x
2. Step 2: Convert to fraction form
   105,264.24/145,196.76 = 62,790/x
3. Step 3: Cross multiply
   105,264.24x = 145,196.76 × 62,790
4. Step 4: Simplify right side
   105,264.24x = 9,116,904,560.40
5. Step 5: Solve for x
   x = 9,116,904,560.40/105,264.24
6. Step 6: Final answer
   x = 86,609.70