Finding the Fourth Proportional to 90,648.76, 135,819.72 and 55,515.04

Step by Step Solution

1. Step 1: Write the proportion equation
   90,648.76 : 135,819.72 = 55,515.04 : x
2. Step 2: Convert to fraction form
   90,648.76/135,819.72 = 55,515.04/x
3. Step 3: Cross multiply
   90,648.76x = 135,819.72 × 55,515.04
4. Step 4: Simplify right side
   90,648.76x = 7,540,037,188.59
5. Step 5: Solve for x
   x = 7,540,037,188.59/90,648.76
6. Step 6: Final answer
   x = 83,178.60