Finding the Fourth Proportional to 171,128.89, 256,723.31 and 58,820.77

Step by Step Solution

1. Step 1: Write the proportion equation
   171,128.89 : 256,723.31 = 58,820.77 : x
2. Step 2: Convert to fraction form
   171,128.89/256,723.31 = 58,820.77/x
3. Step 3: Cross multiply
   171,128.89x = 256,723.31 × 58,820.77
4. Step 4: Simplify right side
   171,128.89x = 15,100,662,771.15
5. Step 5: Solve for x
   x = 15,100,662,771.15/171,128.89
6. Step 6: Final answer
   x = 88,241.46