Finding the Fourth Proportional to 28,978.56, 43,385.10 and 19,087.68

Step by Step Solution

1. Step 1: Write the proportion equation
   28,978.56 : 43,385.10 = 19,087.68 : x
2. Step 2: Convert to fraction form
   28,978.56/43,385.10 = 19,087.68/x
3. Step 3: Cross multiply
   28,978.56x = 43,385.10 × 19,087.68
4. Step 4: Simplify right side
   28,978.56x = 828,120,905.57
5. Step 5: Solve for x
   x = 828,120,905.57/28,978.56
6. Step 6: Final answer
   x = 28,577.02