Finding the Fourth Proportional to 144,817.86, 199,837.72 and 81,143.34

Step by Step Solution

1. Step 1: Write the proportion equation
   144,817.86 : 199,837.72 = 81,143.34 : x
2. Step 2: Convert to fraction form
   144,817.86/199,837.72 = 81,143.34/x
3. Step 3: Cross multiply
   144,817.86x = 199,837.72 × 81,143.34
4. Step 4: Simplify right side
   144,817.86x = 16,215,500,058.78
5. Step 5: Solve for x
   x = 16,215,500,058.78/144,817.86
6. Step 6: Final answer
   x = 111,971.69