Finding the Fourth Proportional to 142,970.40, 214,386.21 and 43,111.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142,970.40 : 214,386.21 = 43,111.98 : x
2. Step 2: Convert to fraction form
   142,970.40/214,386.21 = 43,111.98/x
3. Step 3: Cross multiply
   142,970.40x = 214,386.21 × 43,111.98
4. Step 4: Simplify right side
   142,970.40x = 9,242,613,997.80
5. Step 5: Solve for x
   x = 9,242,613,997.80/142,970.40
6. Step 6: Final answer
   x = 64,647.05