Finding the Fourth Proportional to 142,651.17, 196,858.53 and 78,993

Step by Step Solution

1. Step 1: Write the proportion equation
   142,651.17 : 196,858.53 = 78,993 : x
2. Step 2: Convert to fraction form
   142,651.17/196,858.53 = 78,993/x
3. Step 3: Cross multiply
   142,651.17x = 196,858.53 × 78,993
4. Step 4: Simplify right side
   142,651.17x = 15,550,445,860.29
5. Step 5: Solve for x
   x = 15,550,445,860.29/142,651.17
6. Step 6: Final answer
   x = 109,010.29