Finding the Fourth Proportional to 343,856.82, 515,760.81 and 91,131.69

Step by Step Solution

1. Step 1: Write the proportion equation
   343,856.82 : 515,760.81 = 91,131.69 : x
2. Step 2: Convert to fraction form
   343,856.82/515,760.81 = 91,131.69/x
3. Step 3: Cross multiply
   343,856.82x = 515,760.81 × 91,131.69
4. Step 4: Simplify right side
   343,856.82x = 47,002,154,251.07
5. Step 5: Solve for x
   x = 47,002,154,251.07/343,856.82
6. Step 6: Final answer
   x = 136,691.06