Finding the Fourth Proportional to 142,699.37, 214,047.50 and 42,855.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,699.37 : 214,047.50 = 42,855.30 : x
2. Step 2: Convert to fraction form
   142,699.37/214,047.50 = 42,855.30/x
3. Step 3: Cross multiply
   142,699.37x = 214,047.50 × 42,855.30
4. Step 4: Simplify right side
   142,699.37x = 9,173,069,612.47
5. Step 5: Solve for x
   x = 9,173,069,612.47/142,699.37
6. Step 6: Final answer
   x = 64,282.48