Finding the Fourth Proportional to 72,856.58, 109,202.82 and 37,218.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,856.58 : 109,202.82 = 37,218.20 : x
2. Step 2: Convert to fraction form
   72,856.58/109,202.82 = 37,218.20/x
3. Step 3: Cross multiply
   72,856.58x = 109,202.82 × 37,218.20
4. Step 4: Simplify right side
   72,856.58x = 4,064,332,395.32
5. Step 5: Solve for x
   x = 4,064,332,395.32/72,856.58
6. Step 6: Final answer
   x = 55,785.39