Finding the Fourth Proportional to 35,987.39, 53,981.76 and 12,300.36

Step by Step Solution

1. Step 1: Write the proportion equation
   35,987.39 : 53,981.76 = 12,300.36 : x
2. Step 2: Convert to fraction form
   35,987.39/53,981.76 = 12,300.36/x
3. Step 3: Cross multiply
   35,987.39x = 53,981.76 × 12,300.36
4. Step 4: Simplify right side
   35,987.39x = 663,995,081.43
5. Step 5: Solve for x
   x = 663,995,081.43/35,987.39
6. Step 6: Final answer
   x = 18,450.77