Finding the Fourth Proportional to 11,705.60, 17,558.41 and 4,780.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,705.60 : 17,558.41 = 4,780.10 : x
2. Step 2: Convert to fraction form
   11,705.60/17,558.41 = 4,780.10/x
3. Step 3: Cross multiply
   11,705.60x = 17,558.41 × 4,780.10
4. Step 4: Simplify right side
   11,705.60x = 83,930,855.90
5. Step 5: Solve for x
   x = 83,930,855.90/11,705.60
6. Step 6: Final answer
   x = 7,170.15