Finding the Fourth Proportional to 142,998.78, 197,334.56 and 78,467.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142,998.78 : 197,334.56 = 78,467.82 : x
2. Step 2: Convert to fraction form
   142,998.78/197,334.56 = 78,467.82/x
3. Step 3: Cross multiply
   142,998.78x = 197,334.56 × 78,467.82
4. Step 4: Simplify right side
   142,998.78x = 15,484,411,895.77
5. Step 5: Solve for x
   x = 15,484,411,895.77/142,998.78
6. Step 6: Final answer
   x = 108,283.52