Finding the Fourth Proportional to 78,061.61, 117,092.71 and 18,897.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,061.61 : 117,092.71 = 18,897.18 : x
2. Step 2: Convert to fraction form
   78,061.61/117,092.71 = 18,897.18/x
3. Step 3: Cross multiply
   78,061.61x = 117,092.71 × 18,897.18
4. Step 4: Simplify right side
   78,061.61x = 2,212,721,970.31
5. Step 5: Solve for x
   x = 2,212,721,970.31/78,061.61
6. Step 6: Final answer
   x = 28,345.84