Finding the Fourth Proportional to 106,693.71, 147,112.43 and 72,722.31

Step by Step Solution

1. Step 1: Write the proportion equation
   106,693.71 : 147,112.43 = 72,722.31 : x
2. Step 2: Convert to fraction form
   106,693.71/147,112.43 = 72,722.31/x
3. Step 3: Cross multiply
   106,693.71x = 147,112.43 × 72,722.31
4. Step 4: Simplify right side
   106,693.71x = 10,698,355,375.70
5. Step 5: Solve for x
   x = 10,698,355,375.70/106,693.71
6. Step 6: Final answer
   x = 100,271.66