Finding the Fourth Proportional to 100,662.72, 138,906.24 and 58,224

Step by Step Solution

1. Step 1: Write the proportion equation
   100,662.72 : 138,906.24 = 58,224 : x
2. Step 2: Convert to fraction form
   100,662.72/138,906.24 = 58,224/x
3. Step 3: Cross multiply
   100,662.72x = 138,906.24 × 58,224
4. Step 4: Simplify right side
   100,662.72x = 8,087,676,917.76
5. Step 5: Solve for x
   x = 8,087,676,917.76/100,662.72
6. Step 6: Final answer
   x = 80,344.31