Finding the Fourth Proportional to 143,978.55, 215,953.23 and 38,808.15

Step by Step Solution

1. Step 1: Write the proportion equation
   143,978.55 : 215,953.23 = 38,808.15 : x
2. Step 2: Convert to fraction form
   143,978.55/215,953.23 = 38,808.15/x
3. Step 3: Cross multiply
   143,978.55x = 215,953.23 × 38,808.15
4. Step 4: Simplify right side
   143,978.55x = 8,380,745,342.82
5. Step 5: Solve for x
   x = 8,380,745,342.82/143,978.55
6. Step 6: Final answer
   x = 58,208.29