Finding the Fourth Proportional to 56,813.47, 78,408.13 and 42,448.37

Step by Step Solution

1. Step 1: Write the proportion equation
   56,813.47 : 78,408.13 = 42,448.37 : x
2. Step 2: Convert to fraction form
   56,813.47/78,408.13 = 42,448.37/x
3. Step 3: Cross multiply
   56,813.47x = 78,408.13 × 42,448.37
4. Step 4: Simplify right side
   56,813.47x = 3,328,297,216.34
5. Step 5: Solve for x
   x = 3,328,297,216.34/56,813.47
6. Step 6: Final answer
   x = 58,582.89