Finding the Fourth Proportional to 100,856.72, 150,863.69 and 70,868.86

Step by Step Solution

1. Step 1: Write the proportion equation
   100,856.72 : 150,863.69 = 70,868.86 : x
2. Step 2: Convert to fraction form
   100,856.72/150,863.69 = 70,868.86/x
3. Step 3: Cross multiply
   100,856.72x = 150,863.69 × 70,868.86
4. Step 4: Simplify right side
   100,856.72x = 10,691,537,525.71
5. Step 5: Solve for x
   x = 10,691,537,525.71/100,856.72
6. Step 6: Final answer
   x = 106,007.19