Finding the Fourth Proportional to 15,501.98, 21,393.01 and 8,428.46

Step by Step Solution

1. Step 1: Write the proportion equation
   15,501.98 : 21,393.01 = 8,428.46 : x
2. Step 2: Convert to fraction form
   15,501.98/21,393.01 = 8,428.46/x
3. Step 3: Cross multiply
   15,501.98x = 21,393.01 × 8,428.46
4. Step 4: Simplify right side
   15,501.98x = 180,310,032.64
5. Step 5: Solve for x
   x = 180,310,032.64/15,501.98
6. Step 6: Final answer
   x = 11,631.42