Finding the Fourth Proportional to 142,225.16, 196,258.02 and 81,779.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,225.16 : 196,258.02 = 81,779.72 : x
2. Step 2: Convert to fraction form
   142,225.16/196,258.02 = 81,779.72/x
3. Step 3: Cross multiply
   142,225.16x = 196,258.02 × 81,779.72
4. Step 4: Simplify right side
   142,225.16x = 16,049,925,923.35
5. Step 5: Solve for x
   x = 16,049,925,923.35/142,225.16
6. Step 6: Final answer
   x = 112,848.71