Finding the Fourth Proportional to 142,434.99, 196,564.23 and 78,776.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142,434.99 : 196,564.23 = 78,776.82 : x
2. Step 2: Convert to fraction form
   142,434.99/196,564.23 = 78,776.82/x
3. Step 3: Cross multiply
   142,434.99x = 196,564.23 × 78,776.82
4. Step 4: Simplify right side
   142,434.99x = 15,484,704,965.15
5. Step 5: Solve for x
   x = 15,484,704,965.15/142,434.99
6. Step 6: Final answer
   x = 108,714.19