Finding the Fourth Proportional to 258,271.59, 356,443.71 and 156,353.25

Step by Step Solution

1. Step 1: Write the proportion equation
   258,271.59 : 356,443.71 = 156,353.25 : x
2. Step 2: Convert to fraction form
   258,271.59/356,443.71 = 156,353.25/x
3. Step 3: Cross multiply
   258,271.59x = 356,443.71 × 156,353.25
4. Step 4: Simplify right side
   258,271.59x = 55,731,132,500.56
5. Step 5: Solve for x
   x = 55,731,132,500.56/258,271.59
6. Step 6: Final answer
   x = 215,784.99