Finding the Fourth Proportional to 142,967.90, 214,453.40 and 43,128.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,967.90 : 214,453.40 = 43,128.96 : x
2. Step 2: Convert to fraction form
   142,967.90/214,453.40 = 43,128.96/x
3. Step 3: Cross multiply
   142,967.90x = 214,453.40 × 43,128.96
4. Step 4: Simplify right side
   142,967.90x = 9,249,151,894.82
5. Step 5: Solve for x
   x = 9,249,151,894.82/142,967.90
6. Step 6: Final answer
   x = 64,693.91