Finding the Fourth Proportional to 72,863.74, 100,533.72 and 55,885.33

Step by Step Solution

1. Step 1: Write the proportion equation
   72,863.74 : 100,533.72 = 55,885.33 : x
2. Step 2: Convert to fraction form
   72,863.74/100,533.72 = 55,885.33/x
3. Step 3: Cross multiply
   72,863.74x = 100,533.72 × 55,885.33
4. Step 4: Simplify right side
   72,863.74x = 5,618,360,118.33
5. Step 5: Solve for x
   x = 5,618,360,118.33/72,863.74
6. Step 6: Final answer
   x = 77,107.76