Finding the Fourth Proportional to 142,477.38, 196,617.98 and 78,813.81

Step by Step Solution

1. Step 1: Write the proportion equation
   142,477.38 : 196,617.98 = 78,813.81 : x
2. Step 2: Convert to fraction form
   142,477.38/196,617.98 = 78,813.81/x
3. Step 3: Cross multiply
   142,477.38x = 196,617.98 × 78,813.81
4. Step 4: Simplify right side
   142,477.38x = 15,496,212,315.34
5. Step 5: Solve for x
   x = 15,496,212,315.34/142,477.38
6. Step 6: Final answer
   x = 108,762.61