Finding the Fourth Proportional to 305,191.82, 457,700.25 and 91,980.38

Step by Step Solution

1. Step 1: Write the proportion equation
   305,191.82 : 457,700.25 = 91,980.38 : x
2. Step 2: Convert to fraction form
   305,191.82/457,700.25 = 91,980.38/x
3. Step 3: Cross multiply
   305,191.82x = 457,700.25 × 91,980.38
4. Step 4: Simplify right side
   305,191.82x = 42,099,442,921.10
5. Step 5: Solve for x
   x = 42,099,442,921.10/305,191.82
6. Step 6: Final answer
   x = 137,944.20