Finding the Fourth Proportional to 256,066.31, 384,099.57 and 87,588.27

Step by Step Solution

1. Step 1: Write the proportion equation
   256,066.31 : 384,099.57 = 87,588.27 : x
2. Step 2: Convert to fraction form
   256,066.31/384,099.57 = 87,588.27/x
3. Step 3: Cross multiply
   256,066.31x = 384,099.57 × 87,588.27
4. Step 4: Simplify right side
   256,066.31x = 33,642,616,844.04
5. Step 5: Solve for x
   x = 33,642,616,844.04/256,066.31
6. Step 6: Final answer
   x = 131,382.44