Finding the Fourth Proportional to 30,962.98, 42,741.98 and 20,905.04

Step by Step Solution

1. Step 1: Write the proportion equation
   30,962.98 : 42,741.98 = 20,905.04 : x
2. Step 2: Convert to fraction form
   30,962.98/42,741.98 = 20,905.04/x
3. Step 3: Cross multiply
   30,962.98x = 42,741.98 × 20,905.04
4. Step 4: Simplify right side
   30,962.98x = 893,522,483.34
5. Step 5: Solve for x
   x = 893,522,483.34/30,962.98
6. Step 6: Final answer
   x = 28,857.77