Finding the Fourth Proportional to 142,373.63, 196,479.71 and 78,715.53

Step by Step Solution

1. Step 1: Write the proportion equation
   142,373.63 : 196,479.71 = 78,715.53 : x
2. Step 2: Convert to fraction form
   142,373.63/196,479.71 = 78,715.53/x
3. Step 3: Cross multiply
   142,373.63x = 196,479.71 × 78,715.53
4. Step 4: Simplify right side
   142,373.63x = 15,466,004,113.32
5. Step 5: Solve for x
   x = 15,466,004,113.32/142,373.63
6. Step 6: Final answer
   x = 108,629.70