Finding the Fourth Proportional to 140,052.47, 193,274.72 and 76,390.28

Step by Step Solution

1. Step 1: Write the proportion equation
   140,052.47 : 193,274.72 = 76,390.28 : x
2. Step 2: Convert to fraction form
   140,052.47/193,274.72 = 76,390.28/x
3. Step 3: Cross multiply
   140,052.47x = 193,274.72 × 76,390.28
4. Step 4: Simplify right side
   140,052.47x = 14,764,309,977.72
5. Step 5: Solve for x
   x = 14,764,309,977.72/140,052.47
6. Step 6: Final answer
   x = 105,419.85