Finding the Fourth Proportional to 256,111.74, 384,227.96 and 87,633.90

Step by Step Solution

1. Step 1: Write the proportion equation
   256,111.74 : 384,227.96 = 87,633.90 : x
2. Step 2: Convert to fraction form
   256,111.74/384,227.96 = 87,633.90/x
3. Step 3: Cross multiply
   256,111.74x = 384,227.96 × 87,633.90
4. Step 4: Simplify right side
   256,111.74x = 33,671,394,185.67
5. Step 5: Solve for x
   x = 33,671,394,185.67/256,111.74
6. Step 6: Final answer
   x = 131,471.50