Finding the Fourth Proportional to 15,499.98, 21,397.32 and 9,914.22

Step by Step Solution

1. Step 1: Write the proportion equation
   15,499.98 : 21,397.32 = 9,914.22 : x
2. Step 2: Convert to fraction form
   15,499.98/21,397.32 = 9,914.22/x
3. Step 3: Cross multiply
   15,499.98x = 21,397.32 × 9,914.22
4. Step 4: Simplify right side
   15,499.98x = 212,137,737.89
5. Step 5: Solve for x
   x = 212,137,737.89/15,499.98
6. Step 6: Final answer
   x = 13,686.32