Finding the Fourth Proportional to 140,300.24, 193,613.28 and 76,638.02

Step by Step Solution

1. Step 1: Write the proportion equation
   140,300.24 : 193,613.28 = 76,638.02 : x
2. Step 2: Convert to fraction form
   140,300.24/193,613.28 = 76,638.02/x
3. Step 3: Cross multiply
   140,300.24x = 193,613.28 × 76,638.02
4. Step 4: Simplify right side
   140,300.24x = 14,838,138,424.91
5. Step 5: Solve for x
   x = 14,838,138,424.91/140,300.24
6. Step 6: Final answer
   x = 105,759.89