Finding the Fourth Proportional to 103,436.06, 155,151 and 28,560.78

Step by Step Solution

1. Step 1: Write the proportion equation
   103,436.06 : 155,151 = 28,560.78 : x
2. Step 2: Convert to fraction form
   103,436.06/155,151 = 28,560.78/x
3. Step 3: Cross multiply
   103,436.06x = 155,151 × 28,560.78
4. Step 4: Simplify right side
   103,436.06x = 4,431,233,577.78
5. Step 5: Solve for x
   x = 4,431,233,577.78/103,436.06
6. Step 6: Final answer
   x = 42,840.32