Finding the Fourth Proportional to 38,619.57, 53,300.04 and 21,630.30

Step by Step Solution

1. Step 1: Write the proportion equation
   38,619.57 : 53,300.04 = 21,630.30 : x
2. Step 2: Convert to fraction form
   38,619.57/53,300.04 = 21,630.30/x
3. Step 3: Cross multiply
   38,619.57x = 53,300.04 × 21,630.30
4. Step 4: Simplify right side
   38,619.57x = 1,152,895,855.21
5. Step 5: Solve for x
   x = 1,152,895,855.21/38,619.57
6. Step 6: Final answer
   x = 29,852.63