Finding the Fourth Proportional to 56,640, 84,969.72 and 17,201.10

Step by Step Solution

1. Step 1: Write the proportion equation
   56,640 : 84,969.72 = 17,201.10 : x
2. Step 2: Convert to fraction form
   56,640/84,969.72 = 17,201.10/x
3. Step 3: Cross multiply
   56,640x = 84,969.72 × 17,201.10
4. Step 4: Simplify right side
   56,640x = 1,461,572,650.69
5. Step 5: Solve for x
   x = 1,461,572,650.69/56,640
6. Step 6: Final answer
   x = 25,804.60