Finding the Fourth Proportional to 55,384.86, 76,420.86 and 31,510.10

Step by Step Solution

1. Step 1: Write the proportion equation
   55,384.86 : 76,420.86 = 31,510.10 : x
2. Step 2: Convert to fraction form
   55,384.86/76,420.86 = 31,510.10/x
3. Step 3: Cross multiply
   55,384.86x = 76,420.86 × 31,510.10
4. Step 4: Simplify right side
   55,384.86x = 2,408,028,940.69
5. Step 5: Solve for x
   x = 2,408,028,940.69/55,384.86
6. Step 6: Final answer
   x = 43,478.11