Finding the Fourth Proportional to 551,164.61, 826,746.61 and 172,117.83

Step by Step Solution

1. Step 1: Write the proportion equation
   551,164.61 : 826,746.61 = 172,117.83 : x
2. Step 2: Convert to fraction form
   551,164.61/826,746.61 = 172,117.83/x
3. Step 3: Cross multiply
   551,164.61x = 826,746.61 × 172,117.83
4. Step 4: Simplify right side
   551,164.61x = 142,297,829,640.83
5. Step 5: Solve for x
   x = 142,297,829,640.83/551,164.61
6. Step 6: Final answer
   x = 258,176.65