Finding the Fourth Proportional to 30,820.55, 42,533.57 and 18,071.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,820.55 : 42,533.57 = 18,071.96 : x
2. Step 2: Convert to fraction form
   30,820.55/42,533.57 = 18,071.96/x
3. Step 3: Cross multiply
   30,820.55x = 42,533.57 × 18,071.96
4. Step 4: Simplify right side
   30,820.55x = 768,664,885.34
5. Step 5: Solve for x
   x = 768,664,885.34/30,820.55
6. Step 6: Final answer
   x = 24,940.01