Finding the Fourth Proportional to 105,884.78, 146,128.66 and 70,012.58

Step by Step Solution

1. Step 1: Write the proportion equation
   105,884.78 : 146,128.66 = 70,012.58 : x
2. Step 2: Convert to fraction form
   105,884.78/146,128.66 = 70,012.58/x
3. Step 3: Cross multiply
   105,884.78x = 146,128.66 × 70,012.58
4. Step 4: Simplify right side
   105,884.78x = 10,230,843,592.87
5. Step 5: Solve for x
   x = 10,230,843,592.87/105,884.78
6. Step 6: Final answer
   x = 96,622.42