Finding the Fourth Proportional to 142,317.30, 213,510.99 and 100,279.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,317.30 : 213,510.99 = 100,279.49 : x
2. Step 2: Convert to fraction form
   142,317.30/213,510.99 = 100,279.49/x
3. Step 3: Cross multiply
   142,317.30x = 213,510.99 × 100,279.49
4. Step 4: Simplify right side
   142,317.30x = 21,410,772,495.09
5. Step 5: Solve for x
   x = 21,410,772,495.09/142,317.30
6. Step 6: Final answer
   x = 150,443.92