Finding the Fourth Proportional to 103,667.76, 155,501.70 and 28,787.91

Step by Step Solution

1. Step 1: Write the proportion equation
   103,667.76 : 155,501.70 = 28,787.91 : x
2. Step 2: Convert to fraction form
   103,667.76/155,501.70 = 28,787.91/x
3. Step 3: Cross multiply
   103,667.76x = 155,501.70 × 28,787.91
4. Step 4: Simplify right side
   103,667.76x = 4,476,568,253.36
5. Step 5: Solve for x
   x = 4,476,568,253.36/103,667.76
6. Step 6: Final answer
   x = 43,181.87