Finding the Fourth Proportional to 99,578.39, 137,355.39 and 59,262.05

Step by Step Solution

1. Step 1: Write the proportion equation
   99,578.39 : 137,355.39 = 59,262.05 : x
2. Step 2: Convert to fraction form
   99,578.39/137,355.39 = 59,262.05/x
3. Step 3: Cross multiply
   99,578.39x = 137,355.39 × 59,262.05
4. Step 4: Simplify right side
   99,578.39x = 8,139,961,303.17
5. Step 5: Solve for x
   x = 8,139,961,303.17/99,578.39
6. Step 6: Final answer
   x = 81,744.26