Finding the Fourth Proportional to 172,148.16, 257,988.72 and 83,224.56

Step by Step Solution

1. Step 1: Write the proportion equation
   172,148.16 : 257,988.72 = 83,224.56 : x
2. Step 2: Convert to fraction form
   172,148.16/257,988.72 = 83,224.56/x
3. Step 3: Cross multiply
   172,148.16x = 257,988.72 × 83,224.56
4. Step 4: Simplify right side
   172,148.16x = 21,470,997,706.96
5. Step 5: Solve for x
   x = 21,470,997,706.96/172,148.16
6. Step 6: Final answer
   x = 124,723.95