Finding the Fourth Proportional to 30,827.02, 42,541.30 and 21,401.05

Step by Step Solution

1. Step 1: Write the proportion equation
   30,827.02 : 42,541.30 = 21,401.05 : x
2. Step 2: Convert to fraction form
   30,827.02/42,541.30 = 21,401.05/x
3. Step 3: Cross multiply
   30,827.02x = 42,541.30 × 21,401.05
4. Step 4: Simplify right side
   30,827.02x = 910,428,488.37
5. Step 5: Solve for x
   x = 910,428,488.37/30,827.02
6. Step 6: Final answer
   x = 29,533.46