Finding the Fourth Proportional to 71,436.26, 107,119.77 and 21,507.05

Step by Step Solution

1. Step 1: Write the proportion equation
   71,436.26 : 107,119.77 = 21,507.05 : x
2. Step 2: Convert to fraction form
   71,436.26/107,119.77 = 21,507.05/x
3. Step 3: Cross multiply
   71,436.26x = 107,119.77 × 21,507.05
4. Step 4: Simplify right side
   71,436.26x = 2,303,830,436.53
5. Step 5: Solve for x
   x = 2,303,830,436.53/71,436.26
6. Step 6: Final answer
   x = 32,250.15