Finding the Fourth Proportional to 99,733, 150,287.62 and 90,372.64

Step by Step Solution

1. Step 1: Write the proportion equation
   99,733 : 150,287.62 = 90,372.64 : x
2. Step 2: Convert to fraction form
   99,733/150,287.62 = 90,372.64/x
3. Step 3: Cross multiply
   99,733x = 150,287.62 × 90,372.64
4. Step 4: Simplify right side
   99,733x = 13,581,888,978.72
5. Step 5: Solve for x
   x = 13,581,888,978.72/99,733
6. Step 6: Final answer
   x = 136,182.50