Finding the Fourth Proportional to 150,690.52, 207,959.43 and 90,271

Step by Step Solution

1. Step 1: Write the proportion equation
   150,690.52 : 207,959.43 = 90,271 : x
2. Step 2: Convert to fraction form
   150,690.52/207,959.43 = 90,271/x
3. Step 3: Cross multiply
   150,690.52x = 207,959.43 × 90,271
4. Step 4: Simplify right side
   150,690.52x = 18,772,705,705.53
5. Step 5: Solve for x
   x = 18,772,705,705.53/150,690.52
6. Step 6: Final answer
   x = 124,577.88