Finding the Fourth Proportional to 90,869.34, 136,258.20 and 52,930.83

Step by Step Solution

1. Step 1: Write the proportion equation
   90,869.34 : 136,258.20 = 52,930.83 : x
2. Step 2: Convert to fraction form
   90,869.34/136,258.20 = 52,930.83/x
3. Step 3: Cross multiply
   90,869.34x = 136,258.20 × 52,930.83
4. Step 4: Simplify right side
   90,869.34x = 7,212,259,620.31
5. Step 5: Solve for x
   x = 7,212,259,620.31/90,869.34
6. Step 6: Final answer
   x = 79,369.56