Finding the Fourth Proportional to 124,907.39, 172,365.86 and 77,164.91

Step by Step Solution

1. Step 1: Write the proportion equation
   124,907.39 : 172,365.86 = 77,164.91 : x
2. Step 2: Convert to fraction form
   124,907.39/172,365.86 = 77,164.91/x
3. Step 3: Cross multiply
   124,907.39x = 172,365.86 × 77,164.91
4. Step 4: Simplify right side
   124,907.39x = 13,300,594,826.32
5. Step 5: Solve for x
   x = 13,300,594,826.32/124,907.39
6. Step 6: Final answer
   x = 106,483.65