Finding the Fourth Proportional to 21,100.50, 31,602.29 and 10,538.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,100.50 : 31,602.29 = 10,538.10 : x
2. Step 2: Convert to fraction form
   21,100.50/31,602.29 = 10,538.10/x
3. Step 3: Cross multiply
   21,100.50x = 31,602.29 × 10,538.10
4. Step 4: Simplify right side
   21,100.50x = 333,028,039.56
5. Step 5: Solve for x
   x = 333,028,039.56/21,100.50
6. Step 6: Final answer
   x = 15,782.95