Finding the Fourth Proportional to 142,918.63, 214,506.43 and 105,016.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,918.63 : 214,506.43 = 105,016.10 : x
2. Step 2: Convert to fraction form
   142,918.63/214,506.43 = 105,016.10/x
3. Step 3: Cross multiply
   142,918.63x = 214,506.43 × 105,016.10
4. Step 4: Simplify right side
   142,918.63x = 22,526,627,368.45
5. Step 5: Solve for x
   x = 22,526,627,368.45/142,918.63
6. Step 6: Final answer
   x = 157,618.55