Finding the Fourth Proportional to 140,146.50, 193,406.28 and 76,488.38

Step by Step Solution

1. Step 1: Write the proportion equation
   140,146.50 : 193,406.28 = 76,488.38 : x
2. Step 2: Convert to fraction form
   140,146.50/193,406.28 = 76,488.38/x
3. Step 3: Cross multiply
   140,146.50x = 193,406.28 × 76,488.38
4. Step 4: Simplify right side
   140,146.50x = 14,793,333,039.03
5. Step 5: Solve for x
   x = 14,793,333,039.03/140,146.50
6. Step 6: Final answer
   x = 105,556.21