Finding the Fourth Proportional to 78,664.53, 117,995.58 and 19,499.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,664.53 : 117,995.58 = 19,499.81 : x
2. Step 2: Convert to fraction form
   78,664.53/117,995.58 = 19,499.81/x
3. Step 3: Cross multiply
   78,664.53x = 117,995.58 × 19,499.81
4. Step 4: Simplify right side
   78,664.53x = 2,300,890,800.86
5. Step 5: Solve for x
   x = 2,300,890,800.86/78,664.53
6. Step 6: Final answer
   x = 29,249.41