Finding the Fourth Proportional to 21,886.76, 30,407.63 and 21,624.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,886.76 : 30,407.63 = 21,624.32 : x
2. Step 2: Convert to fraction form
   21,886.76/30,407.63 = 21,624.32/x
3. Step 3: Cross multiply
   21,886.76x = 30,407.63 × 21,624.32
4. Step 4: Simplify right side
   21,886.76x = 657,544,061.40
5. Step 5: Solve for x
   x = 657,544,061.40/21,886.76
6. Step 6: Final answer
   x = 30,043.01