Finding the Fourth Proportional to 171,051.50, 256,587.78 and 65,870.57

Step by Step Solution

1. Step 1: Write the proportion equation
   171,051.50 : 256,587.78 = 65,870.57 : x
2. Step 2: Convert to fraction form
   171,051.50/256,587.78 = 65,870.57/x
3. Step 3: Cross multiply
   171,051.50x = 256,587.78 × 65,870.57
4. Step 4: Simplify right side
   171,051.50x = 16,901,582,040.70
5. Step 5: Solve for x
   x = 16,901,582,040.70/171,051.50
6. Step 6: Final answer
   x = 98,809.91