Finding the Fourth Proportional to 90,599.05, 135,870.90 and 43,189.15

Step by Step Solution

1. Step 1: Write the proportion equation
   90,599.05 : 135,870.90 = 43,189.15 : x
2. Step 2: Convert to fraction form
   90,599.05/135,870.90 = 43,189.15/x
3. Step 3: Cross multiply
   90,599.05x = 135,870.90 × 43,189.15
4. Step 4: Simplify right side
   90,599.05x = 5,868,148,680.74
5. Step 5: Solve for x
   x = 5,868,148,680.74/90,599.05
6. Step 6: Final answer
   x = 64,770.53