Finding the Fourth Proportional to 256,784.38, 384,967.89 and 107,136.16

Step by Step Solution

1. Step 1: Write the proportion equation
   256,784.38 : 384,967.89 = 107,136.16 : x
2. Step 2: Convert to fraction form
   256,784.38/384,967.89 = 107,136.16/x
3. Step 3: Cross multiply
   256,784.38x = 384,967.89 × 107,136.16
4. Step 4: Simplify right side
   256,784.38x = 41,243,981,457.90
5. Step 5: Solve for x
   x = 41,243,981,457.90/256,784.38
6. Step 6: Final answer
   x = 160,617.17