Finding the Fourth Proportional to 5,109.60, 7,051.50 and 3,119.58

Step by Step Solution

1. Step 1: Write the proportion equation
   5,109.60 : 7,051.50 = 3,119.58 : x
2. Step 2: Convert to fraction form
   5,109.60/7,051.50 = 3,119.58/x
3. Step 3: Cross multiply
   5,109.60x = 7,051.50 × 3,119.58
4. Step 4: Simplify right side
   5,109.60x = 21,997,718.37
5. Step 5: Solve for x
   x = 21,997,718.37/5,109.60
6. Step 6: Final answer
   x = 4,305.17