Finding the Fourth Proportional to 111,642.87, 167,606.46 and 72,364.35

Step by Step Solution

1. Step 1: Write the proportion equation
   111,642.87 : 167,606.46 = 72,364.35 : x
2. Step 2: Convert to fraction form
   111,642.87/167,606.46 = 72,364.35/x
3. Step 3: Cross multiply
   111,642.87x = 167,606.46 × 72,364.35
4. Step 4: Simplify right side
   111,642.87x = 12,128,732,533.70
5. Step 5: Solve for x
   x = 12,128,732,533.70/111,642.87
6. Step 6: Final answer
   x = 108,638.67