Finding the Fourth Proportional to 142,092.21, 196,087.27 and 78,430.03

Step by Step Solution

1. Step 1: Write the proportion equation
   142,092.21 : 196,087.27 = 78,430.03 : x
2. Step 2: Convert to fraction form
   142,092.21/196,087.27 = 78,430.03/x
3. Step 3: Cross multiply
   142,092.21x = 196,087.27 × 78,430.03
4. Step 4: Simplify right side
   142,092.21x = 15,379,129,488.28
5. Step 5: Solve for x
   x = 15,379,129,488.28/142,092.21
6. Step 6: Final answer
   x = 108,233.45