Finding the Fourth Proportional to 309,613.48, 427,085.15 and 194,709.87

Step by Step Solution

1. Step 1: Write the proportion equation
   309,613.48 : 427,085.15 = 194,709.87 : x
2. Step 2: Convert to fraction form
   309,613.48/427,085.15 = 194,709.87/x
3. Step 3: Cross multiply
   309,613.48x = 427,085.15 × 194,709.87
4. Step 4: Simplify right side
   309,613.48x = 83,157,694,035.43
5. Step 5: Solve for x
   x = 83,157,694,035.43/309,613.48
6. Step 6: Final answer
   x = 268,585.51