Finding the Fourth Proportional to 143,211.56, 214,819.50 and 49,720.28

Step by Step Solution

1. Step 1: Write the proportion equation
   143,211.56 : 214,819.50 = 49,720.28 : x
2. Step 2: Convert to fraction form
   143,211.56/214,819.50 = 49,720.28/x
3. Step 3: Cross multiply
   143,211.56x = 214,819.50 × 49,720.28
4. Step 4: Simplify right side
   143,211.56x = 10,680,885,689.46
5. Step 5: Solve for x
   x = 10,680,885,689.46/143,211.56
6. Step 6: Final answer
   x = 74,581.17