Finding the Fourth Proportional to 143,763.56, 198,389.14 and 90,077.57

Step by Step Solution

1. Step 1: Write the proportion equation
   143,763.56 : 198,389.14 = 90,077.57 : x
2. Step 2: Convert to fraction form
   143,763.56/198,389.14 = 90,077.57/x
3. Step 3: Cross multiply
   143,763.56x = 198,389.14 × 90,077.57
4. Step 4: Simplify right side
   143,763.56x = 17,870,411,645.59
5. Step 5: Solve for x
   x = 17,870,411,645.59/143,763.56
6. Step 6: Final answer
   x = 124,304.18