Finding the Fourth Proportional to 20,689.18, 31,038.63 and 5,898.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,689.18 : 31,038.63 = 5,898.31 : x
2. Step 2: Convert to fraction form
   20,689.18/31,038.63 = 5,898.31/x
3. Step 3: Cross multiply
   20,689.18x = 31,038.63 × 5,898.31
4. Step 4: Simplify right side
   20,689.18x = 183,075,461.72
5. Step 5: Solve for x
   x = 183,075,461.72/20,689.18
6. Step 6: Final answer
   x = 8,848.85