Finding the Fourth Proportional to 142,100.28, 196,099.99 and 78,438.06

Step by Step Solution

1. Step 1: Write the proportion equation
   142,100.28 : 196,099.99 = 78,438.06 : x
2. Step 2: Convert to fraction form
   142,100.28/196,099.99 = 78,438.06/x
3. Step 3: Cross multiply
   142,100.28x = 196,099.99 × 78,438.06
4. Step 4: Simplify right side
   142,100.28x = 15,381,702,585.52
5. Step 5: Solve for x
   x = 15,381,702,585.52/142,100.28
6. Step 6: Final answer
   x = 108,245.41