Finding the Fourth Proportional to 143,817, 198,468.12 and 83,423.40

Step by Step Solution

1. Step 1: Write the proportion equation
   143,817 : 198,468.12 = 83,423.40 : x
2. Step 2: Convert to fraction form
   143,817/198,468.12 = 83,423.40/x
3. Step 3: Cross multiply
   143,817x = 198,468.12 × 83,423.40
4. Step 4: Simplify right side
   143,817x = 16,556,885,362.01
5. Step 5: Solve for x
   x = 16,556,885,362.01/143,817
6. Step 6: Final answer
   x = 115,124.67