Finding the Fourth Proportional to 90,648.52, 135,991.98 and 28,323.72

Step by Step Solution

1. Step 1: Write the proportion equation
   90,648.52 : 135,991.98 = 28,323.72 : x
2. Step 2: Convert to fraction form
   90,648.52/135,991.98 = 28,323.72/x
3. Step 3: Cross multiply
   90,648.52x = 135,991.98 × 28,323.72
4. Step 4: Simplify right side
   90,648.52x = 3,851,798,763.77
5. Step 5: Solve for x
   x = 3,851,798,763.77/90,648.52
6. Step 6: Final answer
   x = 42,491.58