Finding the Fourth Proportional to 105,145.02, 157,678.74 and 82,699.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,145.02 : 157,678.74 = 82,699.56 : x
2. Step 2: Convert to fraction form
   105,145.02/157,678.74 = 82,699.56/x
3. Step 3: Cross multiply
   105,145.02x = 157,678.74 × 82,699.56
4. Step 4: Simplify right side
   105,145.02x = 13,039,962,419.35
5. Step 5: Solve for x
   x = 13,039,962,419.35/105,145.02
6. Step 6: Final answer
   x = 124,018.83