Finding the Fourth Proportional to 72,719.40, 109,084.50 and 53,036.40

Step by Step Solution

1. Step 1: Write the proportion equation
   72,719.40 : 109,084.50 = 53,036.40 : x
2. Step 2: Convert to fraction form
   72,719.40/109,084.50 = 53,036.40/x
3. Step 3: Cross multiply
   72,719.40x = 109,084.50 × 53,036.40
4. Step 4: Simplify right side
   72,719.40x = 5,785,449,175.80
5. Step 5: Solve for x
   x = 5,785,449,175.80/72,719.40
6. Step 6: Final answer
   x = 79,558.54