Finding the Fourth Proportional to 10,557.63, 14,570.55 and 7,021.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,557.63 : 14,570.55 = 7,021.98 : x
2. Step 2: Convert to fraction form
   10,557.63/14,570.55 = 7,021.98/x
3. Step 3: Cross multiply
   10,557.63x = 14,570.55 × 7,021.98
4. Step 4: Simplify right side
   10,557.63x = 102,314,110.69
5. Step 5: Solve for x
   x = 102,314,110.69/10,557.63
6. Step 6: Final answer
   x = 9,691.01