Finding the Fourth Proportional to 108,011.85, 162,212.18 and 78,463.05

Step by Step Solution

1. Step 1: Write the proportion equation
   108,011.85 : 162,212.18 = 78,463.05 : x
2. Step 2: Convert to fraction form
   108,011.85/162,212.18 = 78,463.05/x
3. Step 3: Cross multiply
   108,011.85x = 162,212.18 × 78,463.05
4. Step 4: Simplify right side
   108,011.85x = 12,727,661,997.63
5. Step 5: Solve for x
   x = 12,727,661,997.63/108,011.85
6. Step 6: Final answer
   x = 117,835.79