Finding the Fourth Proportional to 142,783.69, 197,039.12 and 78,252.43

Step by Step Solution

1. Step 1: Write the proportion equation
   142,783.69 : 197,039.12 = 78,252.43 : x
2. Step 2: Convert to fraction form
   142,783.69/197,039.12 = 78,252.43/x
3. Step 3: Cross multiply
   142,783.69x = 197,039.12 × 78,252.43
4. Step 4: Simplify right side
   142,783.69x = 15,418,788,959.87
5. Step 5: Solve for x
   x = 15,418,788,959.87/142,783.69
6. Step 6: Final answer
   x = 107,987.05