Finding the Fourth Proportional to 103,888.71, 143,315.06 and 65,119.55

Step by Step Solution

1. Step 1: Write the proportion equation
   103,888.71 : 143,315.06 = 65,119.55 : x
2. Step 2: Convert to fraction form
   103,888.71/143,315.06 = 65,119.55/x
3. Step 3: Cross multiply
   103,888.71x = 143,315.06 × 65,119.55
4. Step 4: Simplify right side
   103,888.71x = 9,332,611,173.25
5. Step 5: Solve for x
   x = 9,332,611,173.25/103,888.71
6. Step 6: Final answer
   x = 89,832.78