Finding the Fourth Proportional to 142,719.84, 213,211.72 and 92,389.92

Step by Step Solution

1. Step 1: Write the proportion equation
   142,719.84 : 213,211.72 = 92,389.92 : x
2. Step 2: Convert to fraction form
   142,719.84/213,211.72 = 92,389.92/x
3. Step 3: Cross multiply
   142,719.84x = 213,211.72 × 92,389.92
4. Step 4: Simplify right side
   142,719.84x = 19,698,613,753.86
5. Step 5: Solve for x
   x = 19,698,613,753.86/142,719.84
6. Step 6: Final answer
   x = 138,022.95