Finding the Fourth Proportional to 143,761.56, 198,386.38 and 90,075.57

Step by Step Solution

1. Step 1: Write the proportion equation
   143,761.56 : 198,386.38 = 90,075.57 : x
2. Step 2: Convert to fraction form
   143,761.56/198,386.38 = 90,075.57/x
3. Step 3: Cross multiply
   143,761.56x = 198,386.38 × 90,075.57
4. Step 4: Simplify right side
   143,761.56x = 17,869,766,258.74
5. Step 5: Solve for x
   x = 17,869,766,258.74/143,761.56
6. Step 6: Final answer
   x = 124,301.42