Finding the Fourth Proportional to 139,387.84, 209,116.96 and 60,482.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,387.84 : 209,116.96 = 60,482.88 : x
2. Step 2: Convert to fraction form
   139,387.84/209,116.96 = 60,482.88/x
3. Step 3: Cross multiply
   139,387.84x = 209,116.96 × 60,482.88
4. Step 4: Simplify right side
   139,387.84x = 12,647,995,997.64
5. Step 5: Solve for x
   x = 12,647,995,997.64/139,387.84
6. Step 6: Final answer
   x = 90,739.59