Finding the Fourth Proportional to 142,396.03, 196,498.67 and 78,729.63

Step by Step Solution

1. Step 1: Write the proportion equation
   142,396.03 : 196,498.67 = 78,729.63 : x
2. Step 2: Convert to fraction form
   142,396.03/196,498.67 = 78,729.63/x
3. Step 3: Cross multiply
   142,396.03x = 196,498.67 × 78,729.63
4. Step 4: Simplify right side
   142,396.03x = 15,470,266,602.10
5. Step 5: Solve for x
   x = 15,470,266,602.10/142,396.03
6. Step 6: Final answer
   x = 108,642.54