Finding the Fourth Proportional to 6,111.60, 8,437.08 and 5,113.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.60 : 8,437.08 = 5,113.20 : x
2. Step 2: Convert to fraction form
   6,111.60/8,437.08 = 5,113.20/x
3. Step 3: Cross multiply
   6,111.60x = 8,437.08 × 5,113.20
4. Step 4: Simplify right side
   6,111.60x = 43,140,477.46
5. Step 5: Solve for x
   x = 43,140,477.46/6,111.60
6. Step 6: Final answer
   x = 7,058.79