Finding the Fourth Proportional to 91,017.50, 125,608.05 and 50,731.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91,017.50 : 125,608.05 = 50,731.25 : x
2. Step 2: Convert to fraction form
   91,017.50/125,608.05 = 50,731.25/x
3. Step 3: Cross multiply
   91,017.50x = 125,608.05 × 50,731.25
4. Step 4: Simplify right side
   91,017.50x = 6,372,252,758.52
5. Step 5: Solve for x
   x = 6,372,252,758.52/91,017.50
6. Step 6: Final answer
   x = 70,011.30