Finding the Fourth Proportional to 142,806.60, 214,166.72 and 42,940.28

Step by Step Solution

1. Step 1: Write the proportion equation
   142,806.60 : 214,166.72 = 42,940.28 : x
2. Step 2: Convert to fraction form
   142,806.60/214,166.72 = 42,940.28/x
3. Step 3: Cross multiply
   142,806.60x = 214,166.72 × 42,940.28
4. Step 4: Simplify right side
   142,806.60x = 9,196,379,566.25
5. Step 5: Solve for x
   x = 9,196,379,566.25/142,806.60
6. Step 6: Final answer
   x = 64,397.44