Finding the Fourth Proportional to 21,112.30, 31,655.88 and 7,068.92

Step by Step Solution

1. Step 1: Write the proportion equation
   21,112.30 : 31,655.88 = 7,068.92 : x
2. Step 2: Convert to fraction form
   21,112.30/31,655.88 = 7,068.92/x
3. Step 3: Cross multiply
   21,112.30x = 31,655.88 × 7,068.92
4. Step 4: Simplify right side
   21,112.30x = 223,772,883.25
5. Step 5: Solve for x
   x = 223,772,883.25/21,112.30
6. Step 6: Final answer
   x = 10,599.17