Finding the Fourth Proportional to 90,848.27, 136,278.17 and 28,521.23

Step by Step Solution

1. Step 1: Write the proportion equation
   90,848.27 : 136,278.17 = 28,521.23 : x
2. Step 2: Convert to fraction form
   90,848.27/136,278.17 = 28,521.23/x
3. Step 3: Cross multiply
   90,848.27x = 136,278.17 × 28,521.23
4. Step 4: Simplify right side
   90,848.27x = 3,886,821,030.55
5. Step 5: Solve for x
   x = 3,886,821,030.55/90,848.27
6. Step 6: Final answer
   x = 42,783.65