Finding the Fourth Proportional to 172,279.30, 257,981.55 and 164,406.10

Step by Step Solution

1. Step 1: Write the proportion equation
   172,279.30 : 257,981.55 = 164,406.10 : x
2. Step 2: Convert to fraction form
   172,279.30/257,981.55 = 164,406.10/x
3. Step 3: Cross multiply
   172,279.30x = 257,981.55 × 164,406.10
4. Step 4: Simplify right side
   172,279.30x = 42,413,740,507.46
5. Step 5: Solve for x
   x = 42,413,740,507.46/172,279.30
6. Step 6: Final answer
   x = 246,191.74