Finding the Fourth Proportional to 142,647.48, 213,971.01 and 42,807.51

Step by Step Solution

1. Step 1: Write the proportion equation
   142,647.48 : 213,971.01 = 42,807.51 : x
2. Step 2: Convert to fraction form
   142,647.48/213,971.01 = 42,807.51/x
3. Step 3: Cross multiply
   142,647.48x = 213,971.01 × 42,807.51
4. Step 4: Simplify right side
   142,647.48x = 9,159,566,150.29
5. Step 5: Solve for x
   x = 9,159,566,150.29/142,647.48
6. Step 6: Final answer
   x = 64,211.20