Finding the Fourth Proportional to 90,533, 135,803.18 and 43,123.72

Step by Step Solution

1. Step 1: Write the proportion equation
   90,533 : 135,803.18 = 43,123.72 : x
2. Step 2: Convert to fraction form
   90,533/135,803.18 = 43,123.72/x
3. Step 3: Cross multiply
   90,533x = 135,803.18 × 43,123.72
4. Step 4: Simplify right side
   90,533x = 5,856,338,309.43
5. Step 5: Solve for x
   x = 5,856,338,309.43/90,533
6. Step 6: Final answer
   x = 64,687.33