Finding the Fourth Proportional to 105,144.52, 157,678.02 and 82,699.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,144.52 : 157,678.02 = 82,699.12 : x
2. Step 2: Convert to fraction form
   105,144.52/157,678.02 = 82,699.12/x
3. Step 3: Cross multiply
   105,144.52x = 157,678.02 × 82,699.12
4. Step 4: Simplify right side
   105,144.52x = 13,039,833,497.34
5. Step 5: Solve for x
   x = 13,039,833,497.34/105,144.52
6. Step 6: Final answer
   x = 124,018.19