Finding the Fourth Proportional to 140,061.60, 193,284.69 and 76,399.40

Step by Step Solution

1. Step 1: Write the proportion equation
   140,061.60 : 193,284.69 = 76,399.40 : x
2. Step 2: Convert to fraction form
   140,061.60/193,284.69 = 76,399.40/x
3. Step 3: Cross multiply
   140,061.60x = 193,284.69 × 76,399.40
4. Step 4: Simplify right side
   140,061.60x = 14,766,833,378.76
5. Step 5: Solve for x
   x = 14,766,833,378.76/140,061.60
6. Step 6: Final answer
   x = 105,430.99