Finding the Fourth Proportional to 78,111.88, 117,168.51 and 18,948.06

Step by Step Solution

1. Step 1: Write the proportion equation
   78,111.88 : 117,168.51 = 18,948.06 : x
2. Step 2: Convert to fraction form
   78,111.88/117,168.51 = 18,948.06/x
3. Step 3: Cross multiply
   78,111.88x = 117,168.51 × 18,948.06
4. Step 4: Simplify right side
   78,111.88x = 2,220,115,957.59
5. Step 5: Solve for x
   x = 2,220,115,957.59/78,111.88
6. Step 6: Final answer
   x = 28,422.26