Finding the Fourth Proportional to 143,781.55, 198,419.33 and 83,388.01

Step by Step Solution

1. Step 1: Write the proportion equation
   143,781.55 : 198,419.33 = 83,388.01 : x
2. Step 2: Convert to fraction form
   143,781.55/198,419.33 = 83,388.01/x
3. Step 3: Cross multiply
   143,781.55x = 198,419.33 × 83,388.01
4. Step 4: Simplify right side
   143,781.55x = 16,545,792,082.14
5. Step 5: Solve for x
   x = 16,545,792,082.14/143,781.55
6. Step 6: Final answer
   x = 115,075.91