Finding the Fourth Proportional to 72,087.39, 99,479.61 and 41,889.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,087.39 : 99,479.61 = 41,889.78 : x
2. Step 2: Convert to fraction form
   72,087.39/99,479.61 = 41,889.78/x
3. Step 3: Cross multiply
   72,087.39x = 99,479.61 × 41,889.78
4. Step 4: Simplify right side
   72,087.39x = 4,167,178,977.39
5. Step 5: Solve for x
   x = 4,167,178,977.39/72,087.39
6. Step 6: Final answer
   x = 57,807.32