Finding the Fourth Proportional to 78,061.42, 117,092.43 and 18,896.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,061.42 : 117,092.43 = 18,896.99 : x
2. Step 2: Convert to fraction form
   78,061.42/117,092.43 = 18,896.99/x
3. Step 3: Cross multiply
   78,061.42x = 117,092.43 × 18,896.99
4. Step 4: Simplify right side
   78,061.42x = 2,212,694,478.79
5. Step 5: Solve for x
   x = 2,212,694,478.79/78,061.42
6. Step 6: Final answer
   x = 28,345.56