Finding the Fourth Proportional to 71,008.32, 106,362.72 and 42,840.48

Step by Step Solution

1. Step 1: Write the proportion equation
   71,008.32 : 106,362.72 = 42,840.48 : x
2. Step 2: Convert to fraction form
   71,008.32/106,362.72 = 42,840.48/x
3. Step 3: Cross multiply
   71,008.32x = 106,362.72 × 42,840.48
4. Step 4: Simplify right side
   71,008.32x = 4,556,629,978.91
5. Step 5: Solve for x
   x = 4,556,629,978.91/71,008.32
6. Step 6: Final answer
   x = 64,170.37