Finding the Fourth Proportional to 142,637.52, 196,842.86 and 78,109.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,637.52 : 196,842.86 = 78,109.49 : x
2. Step 2: Convert to fraction form
   142,637.52/196,842.86 = 78,109.49/x
3. Step 3: Cross multiply
   142,637.52x = 196,842.86 × 78,109.49
4. Step 4: Simplify right side
   142,637.52x = 15,375,294,029.98
5. Step 5: Solve for x
   x = 15,375,294,029.98/142,637.52
6. Step 6: Final answer
   x = 107,792.77