Finding the Fourth Proportional to 217,789.59, 326,696.69 and 77,548.22

Step by Step Solution

1. Step 1: Write the proportion equation
   217,789.59 : 326,696.69 = 77,548.22 : x
2. Step 2: Convert to fraction form
   217,789.59/326,696.69 = 77,548.22/x
3. Step 3: Cross multiply
   217,789.59x = 326,696.69 × 77,548.22
4. Step 4: Simplify right side
   217,789.59x = 25,334,746,574.89
5. Step 5: Solve for x
   x = 25,334,746,574.89/217,789.59
6. Step 6: Final answer
   x = 116,326.71