Finding the Fourth Proportional to 100,789.38, 139,084.32 and 55,466.19

Step by Step Solution

1. Step 1: Write the proportion equation
   100,789.38 : 139,084.32 = 55,466.19 : x
2. Step 2: Convert to fraction form
   100,789.38/139,084.32 = 55,466.19/x
3. Step 3: Cross multiply
   100,789.38x = 139,084.32 × 55,466.19
4. Step 4: Simplify right side
   100,789.38x = 7,714,477,450.32
5. Step 5: Solve for x
   x = 7,714,477,450.32/100,789.38
6. Step 6: Final answer
   x = 76,540.58