Finding the Fourth Proportional to 140,068.91, 193,293.86 and 76,405.34

Step by Step Solution

1. Step 1: Write the proportion equation
   140,068.91 : 193,293.86 = 76,405.34 : x
2. Step 2: Convert to fraction form
   140,068.91/193,293.86 = 76,405.34/x
3. Step 3: Cross multiply
   140,068.91x = 193,293.86 × 76,405.34
4. Step 4: Simplify right side
   140,068.91x = 14,768,681,744.72
5. Step 5: Solve for x
   x = 14,768,681,744.72/140,068.91
6. Step 6: Final answer
   x = 105,438.69