Finding the Fourth Proportional to 58,445, 87,623.76 and 18,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   58,445 : 87,623.76 = 18,978.56 : x
2. Step 2: Convert to fraction form
   58,445/87,623.76 = 18,978.56/x
3. Step 3: Cross multiply
   58,445x = 87,623.76 × 18,978.56
4. Step 4: Simplify right side
   58,445x = 1,662,972,786.59
5. Step 5: Solve for x
   x = 1,662,972,786.59/58,445
6. Step 6: Final answer
   x = 28,453.64