Finding the Fourth Proportional to 55,436.49, 76,412.49 and 43,315.78

Step by Step Solution

1. Step 1: Write the proportion equation
   55,436.49 : 76,412.49 = 43,315.78 : x
2. Step 2: Convert to fraction form
   55,436.49/76,412.49 = 43,315.78/x
3. Step 3: Cross multiply
   55,436.49x = 76,412.49 × 43,315.78
4. Step 4: Simplify right side
   55,436.49x = 3,309,866,389.51
5. Step 5: Solve for x
   x = 3,309,866,389.51/55,436.49
6. Step 6: Final answer
   x = 59,705.55