Finding the Fourth Proportional to 142,436.87, 196,559.52 and 78,773.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,436.87 : 196,559.52 = 78,773.30 : x
2. Step 2: Convert to fraction form
   142,436.87/196,559.52 = 78,773.30/x
3. Step 3: Cross multiply
   142,436.87x = 196,559.52 × 78,773.30
4. Step 4: Simplify right side
   142,436.87x = 15,483,642,036.82
5. Step 5: Solve for x
   x = 15,483,642,036.82/142,436.87
6. Step 6: Final answer
   x = 108,705.30