Finding the Fourth Proportional to 77,766.66, 116,636.79 and 21,612.18

Step by Step Solution

1. Step 1: Write the proportion equation
   77,766.66 : 116,636.79 = 21,612.18 : x
2. Step 2: Convert to fraction form
   77,766.66/116,636.79 = 21,612.18/x
3. Step 3: Cross multiply
   77,766.66x = 116,636.79 × 21,612.18
4. Step 4: Simplify right side
   77,766.66x = 2,520,775,300.10
5. Step 5: Solve for x
   x = 2,520,775,300.10/77,766.66
6. Step 6: Final answer
   x = 32,414.60