Finding the Fourth Proportional to 144,345, 199,199.70 and 80,693.40

Step by Step Solution

1. Step 1: Write the proportion equation
   144,345 : 199,199.70 = 80,693.40 : x
2. Step 2: Convert to fraction form
   144,345/199,199.70 = 80,693.40/x
3. Step 3: Cross multiply
   144,345x = 199,199.70 × 80,693.40
4. Step 4: Simplify right side
   144,345x = 16,074,101,071.98
5. Step 5: Solve for x
   x = 16,074,101,071.98/144,345
6. Step 6: Final answer
   x = 111,358.90