Finding the Fourth Proportional to 78,384.58, 108,111.45 and 54,499.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,384.58 : 108,111.45 = 54,499.30 : x
2. Step 2: Convert to fraction form
   78,384.58/108,111.45 = 54,499.30/x
3. Step 3: Cross multiply
   78,384.58x = 108,111.45 × 54,499.30
4. Step 4: Simplify right side
   78,384.58x = 5,891,998,346.99
5. Step 5: Solve for x
   x = 5,891,998,346.99/78,384.58
6. Step 6: Final answer
   x = 75,167.82