Finding the Fourth Proportional to 21,696.73, 30,094.86 and 21,120.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,696.73 : 30,094.86 = 21,120.94 : x
2. Step 2: Convert to fraction form
   21,696.73/30,094.86 = 21,120.94/x
3. Step 3: Cross multiply
   21,696.73x = 30,094.86 × 21,120.94
4. Step 4: Simplify right side
   21,696.73x = 635,631,561.10
5. Step 5: Solve for x
   x = 635,631,561.10/21,696.73
6. Step 6: Final answer
   x = 29,296.20