Finding the Fourth Proportional to 55,379, 83,067.72 and 25,780.28

Step by Step Solution

1. Step 1: Write the proportion equation
   55,379 : 83,067.72 = 25,780.28 : x
2. Step 2: Convert to fraction form
   55,379/83,067.72 = 25,780.28/x
3. Step 3: Cross multiply
   55,379x = 83,067.72 × 25,780.28
4. Step 4: Simplify right side
   55,379x = 2,141,509,080.56
5. Step 5: Solve for x
   x = 2,141,509,080.56/55,379
6. Step 6: Final answer
   x = 38,670.06