Finding the Fourth Proportional to 78,061.73, 117,092.90 and 18,897.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,061.73 : 117,092.90 = 18,897.31 : x
2. Step 2: Convert to fraction form
   78,061.73/117,092.90 = 18,897.31/x
3. Step 3: Cross multiply
   78,061.73x = 117,092.90 × 18,897.31
4. Step 4: Simplify right side
   78,061.73x = 2,212,740,150.15
5. Step 5: Solve for x
   x = 2,212,740,150.15/78,061.73
6. Step 6: Final answer
   x = 28,346.03