Finding the Fourth Proportional to 307,376.86, 424,181.89 and 171,419.40

Step by Step Solution

1. Step 1: Write the proportion equation
   307,376.86 : 424,181.89 = 171,419.40 : x
2. Step 2: Convert to fraction form
   307,376.86/424,181.89 = 171,419.40/x
3. Step 3: Cross multiply
   307,376.86x = 424,181.89 × 171,419.40
4. Step 4: Simplify right side
   307,376.86x = 72,713,002,525.21
5. Step 5: Solve for x
   x = 72,713,002,525.21/307,376.86
6. Step 6: Final answer
   x = 236,559.78