Finding the Fourth Proportional to 78,061.70, 117,092.82 and 18,897.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,061.70 : 117,092.82 = 18,897.28 : x
2. Step 2: Convert to fraction form
   78,061.70/117,092.82 = 18,897.28/x
3. Step 3: Cross multiply
   78,061.70x = 117,092.82 × 18,897.28
4. Step 4: Simplify right side
   78,061.70x = 2,212,735,805.53
5. Step 5: Solve for x
   x = 2,212,735,805.53/78,061.70
6. Step 6: Final answer
   x = 28,345.99