Finding the Fourth Proportional to 78,061.23, 117,092.15 and 18,896.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,061.23 : 117,092.15 = 18,896.81 : x
2. Step 2: Convert to fraction form
   78,061.23/117,092.15 = 18,896.81/x
3. Step 3: Cross multiply
   78,061.23x = 117,092.15 × 18,896.81
4. Step 4: Simplify right side
   78,061.23x = 2,212,667,431.10
5. Step 5: Solve for x
   x = 2,212,667,431.10/78,061.23
6. Step 6: Final answer
   x = 28,345.28