Finding the Fourth Proportional to 100,858.72, 150,866.68 and 70,870.86

Step by Step Solution

1. Step 1: Write the proportion equation
   100,858.72 : 150,866.68 = 70,870.86 : x
2. Step 2: Convert to fraction form
   100,858.72/150,866.68 = 70,870.86/x
3. Step 3: Cross multiply
   100,858.72x = 150,866.68 × 70,870.86
4. Step 4: Simplify right side
   100,858.72x = 10,692,051,356.94
5. Step 5: Solve for x
   x = 10,692,051,356.94/100,858.72
6. Step 6: Final answer
   x = 106,010.18