Finding the Fourth Proportional to 140,145, 193,404.20 and 76,486.88

Step by Step Solution

1. Step 1: Write the proportion equation
   140,145 : 193,404.20 = 76,486.88 : x
2. Step 2: Convert to fraction form
   140,145/193,404.20 = 76,486.88/x
3. Step 3: Cross multiply
   140,145x = 193,404.20 × 76,486.88
4. Step 4: Simplify right side
   140,145x = 14,792,883,836.90
5. Step 5: Solve for x
   x = 14,792,883,836.90/140,145
6. Step 6: Final answer
   x = 105,554.13