Finding the Fourth Proportional to 56,880.86, 78,500.54 and 31,389.62

Step by Step Solution

1. Step 1: Write the proportion equation
   56,880.86 : 78,500.54 = 31,389.62 : x
2. Step 2: Convert to fraction form
   56,880.86/78,500.54 = 31,389.62/x
3. Step 3: Cross multiply
   56,880.86x = 78,500.54 × 31,389.62
4. Step 4: Simplify right side
   56,880.86x = 2,464,101,806.37
5. Step 5: Solve for x
   x = 2,464,101,806.37/56,880.86
6. Step 6: Final answer
   x = 43,320.41