Finding the Fourth Proportional to 172,304.16, 258,367.40 and 77,453.29

Step by Step Solution

1. Step 1: Write the proportion equation
   172,304.16 : 258,367.40 = 77,453.29 : x
2. Step 2: Convert to fraction form
   172,304.16/258,367.40 = 77,453.29/x
3. Step 3: Cross multiply
   172,304.16x = 258,367.40 × 77,453.29
4. Step 4: Simplify right side
   172,304.16x = 20,011,404,440.39
5. Step 5: Solve for x
   x = 20,011,404,440.39/172,304.16
6. Step 6: Final answer
   x = 116,139.99