Finding the Fourth Proportional to 140,080.34, 193,311.33 and 76,419.47

Step by Step Solution

1. Step 1: Write the proportion equation
   140,080.34 : 193,311.33 = 76,419.47 : x
2. Step 2: Convert to fraction form
   140,080.34/193,311.33 = 76,419.47/x
3. Step 3: Cross multiply
   140,080.34x = 193,311.33 × 76,419.47
4. Step 4: Simplify right side
   140,080.34x = 14,772,749,580.30
5. Step 5: Solve for x
   x = 14,772,749,580.30/140,080.34
6. Step 6: Final answer
   x = 105,459.12