Finding the Fourth Proportional to 53,105.20, 73,279.16 and 31,300.05

Step by Step Solution

1. Step 1: Write the proportion equation
   53,105.20 : 73,279.16 = 31,300.05 : x
2. Step 2: Convert to fraction form
   53,105.20/73,279.16 = 31,300.05/x
3. Step 3: Cross multiply
   53,105.20x = 73,279.16 × 31,300.05
4. Step 4: Simplify right side
   53,105.20x = 2,293,641,450.21
5. Step 5: Solve for x
   x = 2,293,641,450.21/53,105.20
6. Step 6: Final answer
   x = 43,190.52