Finding the Fourth Proportional to 28,978.06, 43,384.35 and 19,087.18

Step by Step Solution

1. Step 1: Write the proportion equation
   28,978.06 : 43,384.35 = 19,087.18 : x
2. Step 2: Convert to fraction form
   28,978.06/43,384.35 = 19,087.18/x
3. Step 3: Cross multiply
   28,978.06x = 43,384.35 × 19,087.18
4. Step 4: Simplify right side
   28,978.06x = 828,084,897.63
5. Step 5: Solve for x
   x = 828,084,897.63/28,978.06
6. Step 6: Final answer
   x = 28,576.27