Finding the Fourth Proportional to 31,389.30, 47,083.92 and 19,710.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,389.30 : 47,083.92 = 19,710.72 : x
2. Step 2: Convert to fraction form
   31,389.30/47,083.92 = 19,710.72/x
3. Step 3: Cross multiply
   31,389.30x = 47,083.92 × 19,710.72
4. Step 4: Simplify right side
   31,389.30x = 928,057,963.62
5. Step 5: Solve for x
   x = 928,057,963.62/31,389.30
6. Step 6: Final answer
   x = 29,566.06