Finding the Fourth Proportional to 70,855.83, 106,158.42 and 66,641.31

Step by Step Solution

1. Step 1: Write the proportion equation
   70,855.83 : 106,158.42 = 66,641.31 : x
2. Step 2: Convert to fraction form
   70,855.83/106,158.42 = 66,641.31/x
3. Step 3: Cross multiply
   70,855.83x = 106,158.42 × 66,641.31
4. Step 4: Simplify right side
   70,855.83x = 7,074,536,176.33
5. Step 5: Solve for x
   x = 7,074,536,176.33/70,855.83
6. Step 6: Final answer
   x = 99,844.09