Finding the Fourth Proportional to 115,870.50, 159,883.29 and 64,869.66

Step by Step Solution

1. Step 1: Write the proportion equation
   115,870.50 : 159,883.29 = 64,869.66 : x
2. Step 2: Convert to fraction form
   115,870.50/159,883.29 = 64,869.66/x
3. Step 3: Cross multiply
   115,870.50x = 159,883.29 × 64,869.66
4. Step 4: Simplify right side
   115,870.50x = 10,371,574,661.98
5. Step 5: Solve for x
   x = 10,371,574,661.98/115,870.50
6. Step 6: Final answer
   x = 89,510.05