Finding the Fourth Proportional to 103,531.61, 155,300.89 and 28,645.49

Step by Step Solution

1. Step 1: Write the proportion equation
   103,531.61 : 155,300.89 = 28,645.49 : x
2. Step 2: Convert to fraction form
   103,531.61/155,300.89 = 28,645.49/x
3. Step 3: Cross multiply
   103,531.61x = 155,300.89 × 28,645.49
4. Step 4: Simplify right side
   103,531.61x = 4,448,670,091.49
5. Step 5: Solve for x
   x = 4,448,670,091.49/103,531.61
6. Step 6: Final answer
   x = 42,969.20