Finding the Fourth Proportional to 142,165.72, 196,188.64 and 81,748.23

Step by Step Solution

1. Step 1: Write the proportion equation
   142,165.72 : 196,188.64 = 81,748.23 : x
2. Step 2: Convert to fraction form
   142,165.72/196,188.64 = 81,748.23/x
3. Step 3: Cross multiply
   142,165.72x = 196,188.64 × 81,748.23
4. Step 4: Simplify right side
   142,165.72x = 16,038,074,066.11
5. Step 5: Solve for x
   x = 16,038,074,066.11/142,165.72
6. Step 6: Final answer
   x = 112,812.53