Finding the Fourth Proportional to 21,663.54, 32,499.90 and 6,870.51

Step by Step Solution

1. Step 1: Write the proportion equation
   21,663.54 : 32,499.90 = 6,870.51 : x
2. Step 2: Convert to fraction form
   21,663.54/32,499.90 = 6,870.51/x
3. Step 3: Cross multiply
   21,663.54x = 32,499.90 × 6,870.51
4. Step 4: Simplify right side
   21,663.54x = 223,290,887.95
5. Step 5: Solve for x
   x = 223,290,887.95/21,663.54
6. Step 6: Final answer
   x = 10,307.22