Finding the Fourth Proportional to 140,211.63, 193,514.27 and 89,171.15

Step by Step Solution

1. Step 1: Write the proportion equation
   140,211.63 : 193,514.27 = 89,171.15 : x
2. Step 2: Convert to fraction form
   140,211.63/193,514.27 = 89,171.15/x
3. Step 3: Cross multiply
   140,211.63x = 193,514.27 × 89,171.15
4. Step 4: Simplify right side
   140,211.63x = 17,255,888,583.88
5. Step 5: Solve for x
   x = 17,255,888,583.88/140,211.63
6. Step 6: Final answer
   x = 123,070.31