Finding the Fourth Proportional to 142,116.57, 196,119.66 and 78,453

Step by Step Solution

1. Step 1: Write the proportion equation
   142,116.57 : 196,119.66 = 78,453 : x
2. Step 2: Convert to fraction form
   142,116.57/196,119.66 = 78,453/x
3. Step 3: Cross multiply
   142,116.57x = 196,119.66 × 78,453
4. Step 4: Simplify right side
   142,116.57x = 15,386,175,980.18
5. Step 5: Solve for x
   x = 15,386,175,980.18/142,116.57
6. Step 6: Final answer
   x = 108,264.48