Finding the Fourth Proportional to 140,080.90, 193,311.37 and 76,418.69

Step by Step Solution

1. Step 1: Write the proportion equation
   140,080.90 : 193,311.37 = 76,418.69 : x
2. Step 2: Convert to fraction form
   140,080.90/193,311.37 = 76,418.69/x
3. Step 3: Cross multiply
   140,080.90x = 193,311.37 × 76,418.69
4. Step 4: Simplify right side
   140,080.90x = 14,772,600,499.90
5. Step 5: Solve for x
   x = 14,772,600,499.90/140,080.90
6. Step 6: Final answer
   x = 105,457.64