Finding the Fourth Proportional to 21,054.47, 31,574.86 and 7,010.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,054.47 : 31,574.86 = 7,010.72 : x
2. Step 2: Convert to fraction form
   21,054.47/31,574.86 = 7,010.72/x
3. Step 3: Cross multiply
   21,054.47x = 31,574.86 × 7,010.72
4. Step 4: Simplify right side
   21,054.47x = 221,362,502.50
5. Step 5: Solve for x
   x = 221,362,502.50/21,054.47
6. Step 6: Final answer
   x = 10,513.80