Finding the Fourth Proportional to 105,178.40, 145,164.89 and 62,156.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,178.40 : 145,164.89 = 62,156.06 : x
2. Step 2: Convert to fraction form
   105,178.40/145,164.89 = 62,156.06/x
3. Step 3: Cross multiply
   105,178.40x = 145,164.89 × 62,156.06
4. Step 4: Simplify right side
   105,178.40x = 9,022,877,042.30
5. Step 5: Solve for x
   x = 9,022,877,042.30/105,178.40
6. Step 6: Final answer
   x = 85,786.41