Finding the Fourth Proportional to 10,499.22, 15,770.70 and 8,858.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,499.22 : 15,770.70 = 8,858.98 : x
2. Step 2: Convert to fraction form
   10,499.22/15,770.70 = 8,858.98/x
3. Step 3: Cross multiply
   10,499.22x = 15,770.70 × 8,858.98
4. Step 4: Simplify right side
   10,499.22x = 139,712,315.89
5. Step 5: Solve for x
   x = 139,712,315.89/10,499.22
6. Step 6: Final answer
   x = 13,306.92