Finding the Fourth Proportional to 22,019.87, 30,345.46 and 21,615.00

Step by Step Solution

1. Step 1: Write the proportion equation
   22,019.87 : 30,345.46 = 21,615.00 : x
2. Step 2: Convert to fraction form
   22,019.87/30,345.46 = 21,615.00/x
3. Step 3: Cross multiply
   22,019.87x = 30,345.46 × 21,615.00
4. Step 4: Simplify right side
   22,019.87x = 655,917,258.71
5. Step 5: Solve for x
   x = 655,917,258.71/22,019.87
6. Step 6: Final answer
   x = 29,787.52