Finding the Fourth Proportional to 20,702,139.24, 28,569,069.27 and 12,005,475.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,702,139.24 : 28,569,069.27 = 12,005,475.42 : x
2. Step 2: Convert to fraction form
   20,702,139.24/28,569,069.27 = 12,005,475.42/x
3. Step 3: Cross multiply
   20,702,139.24x = 28,569,069.27 × 12,005,475.42
4. Step 4: Simplify right side
   20,702,139.24x = 342,985,258,893,262.31
5. Step 5: Solve for x
   x = 342,985,258,893,262.31/20,702,139.24
6. Step 6: Final answer
   x = 16,567,624.00