Finding the Fourth Proportional to 78,388.58, 108,116.96 and 54,503.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,388.58 : 108,116.96 = 54,503.30 : x
2. Step 2: Convert to fraction form
   78,388.58/108,116.96 = 54,503.30/x
3. Step 3: Cross multiply
   78,388.58x = 108,116.96 × 54,503.30
4. Step 4: Simplify right side
   78,388.58x = 5,892,731,105.97
5. Step 5: Solve for x
   x = 5,892,731,105.97/78,388.58
6. Step 6: Final answer
   x = 75,173.34