Finding the Fourth Proportional to 74,978.38, 103,470.37 and 40,987.27

Step by Step Solution

1. Step 1: Write the proportion equation
   74,978.38 : 103,470.37 = 40,987.27 : x
2. Step 2: Convert to fraction form
   74,978.38/103,470.37 = 40,987.27/x
3. Step 3: Cross multiply
   74,978.38x = 103,470.37 × 40,987.27
4. Step 4: Simplify right side
   74,978.38x = 4,240,968,019.06
5. Step 5: Solve for x
   x = 4,240,968,019.06/74,978.38
6. Step 6: Final answer
   x = 56,562.55