Finding the Fourth Proportional to 103,678.37, 155,498.71 and 28,779.69

Step by Step Solution

1. Step 1: Write the proportion equation
   103,678.37 : 155,498.71 = 28,779.69 : x
2. Step 2: Convert to fraction form
   103,678.37/155,498.71 = 28,779.69/x
3. Step 3: Cross multiply
   103,678.37x = 155,498.71 × 28,779.69
4. Step 4: Simplify right side
   103,678.37x = 4,475,204,669.20
5. Step 5: Solve for x
   x = 4,475,204,669.20/103,678.37
6. Step 6: Final answer
   x = 43,164.30