Finding the Fourth Proportional to 46,200.06, 69,304.47 and 12,920.12

Step by Step Solution

1. Step 1: Write the proportion equation
   46,200.06 : 69,304.47 = 12,920.12 : x
2. Step 2: Convert to fraction form
   46,200.06/69,304.47 = 12,920.12/x
3. Step 3: Cross multiply
   46,200.06x = 69,304.47 × 12,920.12
4. Step 4: Simplify right side
   46,200.06x = 895,421,933.86
5. Step 5: Solve for x
   x = 895,421,933.86/46,200.06
6. Step 6: Final answer
   x = 19,381.40