Finding the Fourth Proportional to 105,711.55, 145,888.63 and 69,838.67

Step by Step Solution

1. Step 1: Write the proportion equation
   105,711.55 : 145,888.63 = 69,838.67 : x
2. Step 2: Convert to fraction form
   105,711.55/145,888.63 = 69,838.67/x
3. Step 3: Cross multiply
   105,711.55x = 145,888.63 × 69,838.67
4. Step 4: Simplify right side
   105,711.55x = 10,188,668,077.45
5. Step 5: Solve for x
   x = 10,188,668,077.45/105,711.55
6. Step 6: Final answer
   x = 96,381.79