Finding the Fourth Proportional to 8,498.30, 11,729.32 and 5,430.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,498.30 : 11,729.32 = 5,430.18 : x
2. Step 2: Convert to fraction form
   8,498.30/11,729.32 = 5,430.18/x
3. Step 3: Cross multiply
   8,498.30x = 11,729.32 × 5,430.18
4. Step 4: Simplify right side
   8,498.30x = 63,692,318.88
5. Step 5: Solve for x
   x = 63,692,318.88/8,498.30
6. Step 6: Final answer
   x = 7,494.71