Finding the Fourth Proportional to 103,196.72, 142,441.72 and 67,392.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,196.72 : 142,441.72 = 67,392.30 : x
2. Step 2: Convert to fraction form
   103,196.72/142,441.72 = 67,392.30/x
3. Step 3: Cross multiply
   103,196.72x = 142,441.72 × 67,392.30
4. Step 4: Simplify right side
   103,196.72x = 9,599,475,126.76
5. Step 5: Solve for x
   x = 9,599,475,126.76/103,196.72
6. Step 6: Final answer
   x = 93,021.13