Finding the Fourth Proportional to 51,300.39, 70,823.98 and 39,105.13

Step by Step Solution

1. Step 1: Write the proportion equation
   51,300.39 : 70,823.98 = 39,105.13 : x
2. Step 2: Convert to fraction form
   51,300.39/70,823.98 = 39,105.13/x
3. Step 3: Cross multiply
   51,300.39x = 70,823.98 × 39,105.13
4. Step 4: Simplify right side
   51,300.39x = 2,769,580,816.84
5. Step 5: Solve for x
   x = 2,769,580,816.84/51,300.39
6. Step 6: Final answer
   x = 53,987.52