Finding the Fourth Proportional to 172,451.77, 258,590.69 and 52,485.71

Step by Step Solution

1. Step 1: Write the proportion equation
   172,451.77 : 258,590.69 = 52,485.71 : x
2. Step 2: Convert to fraction form
   172,451.77/258,590.69 = 52,485.71/x
3. Step 3: Cross multiply
   172,451.77x = 258,590.69 × 52,485.71
4. Step 4: Simplify right side
   172,451.77x = 13,572,314,900.71
5. Step 5: Solve for x
   x = 13,572,314,900.71/172,451.77
6. Step 6: Final answer
   x = 78,702.09