Finding the Fourth Proportional to 78,054.66, 117,060.72 and 21,891.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,054.66 : 117,060.72 = 21,891.28 : x
2. Step 2: Convert to fraction form
   78,054.66/117,060.72 = 21,891.28/x
3. Step 3: Cross multiply
   78,054.66x = 117,060.72 × 21,891.28
4. Step 4: Simplify right side
   78,054.66x = 2,562,608,998.52
5. Step 5: Solve for x
   x = 2,562,608,998.52/78,054.66
6. Step 6: Final answer
   x = 32,830.95