Finding the Fourth Proportional to 9,780.90, 14,671.32 and 3,460.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,780.90 : 14,671.32 = 3,460.47 : x
2. Step 2: Convert to fraction form
   9,780.90/14,671.32 = 3,460.47/x
3. Step 3: Cross multiply
   9,780.90x = 14,671.32 × 3,460.47
4. Step 4: Simplify right side
   9,780.90x = 50,769,662.72
5. Step 5: Solve for x
   x = 50,769,662.72/9,780.90
6. Step 6: Final answer
   x = 5,190.69