Finding the Fourth Proportional to 38,525, 53,159.80 and 21,530.16

Step by Step Solution

1. Step 1: Write the proportion equation
   38,525 : 53,159.80 = 21,530.16 : x
2. Step 2: Convert to fraction form
   38,525/53,159.80 = 21,530.16/x
3. Step 3: Cross multiply
   38,525x = 53,159.80 × 21,530.16
4. Step 4: Simplify right side
   38,525x = 1,144,538,999.57
5. Step 5: Solve for x
   x = 1,144,538,999.57/38,525
6. Step 6: Final answer
   x = 29,708.99