Finding the Fourth Proportional to 143,764.56, 198,390.52 and 90,078.57

Step by Step Solution

1. Step 1: Write the proportion equation
   143,764.56 : 198,390.52 = 90,078.57 : x
2. Step 2: Convert to fraction form
   143,764.56/198,390.52 = 90,078.57/x
3. Step 3: Cross multiply
   143,764.56x = 198,390.52 × 90,078.57
4. Step 4: Simplify right side
   143,764.56x = 17,870,734,343.16
5. Step 5: Solve for x
   x = 17,870,734,343.16/143,764.56
6. Step 6: Final answer
   x = 124,305.56