Finding the Fourth Proportional to 153,951.78, 212,393.01 and 89,410.03

Step by Step Solution

1. Step 1: Write the proportion equation
   153,951.78 : 212,393.01 = 89,410.03 : x
2. Step 2: Convert to fraction form
   153,951.78/212,393.01 = 89,410.03/x
3. Step 3: Cross multiply
   153,951.78x = 212,393.01 × 89,410.03
4. Step 4: Simplify right side
   153,951.78x = 18,990,065,395.89
5. Step 5: Solve for x
   x = 18,990,065,395.89/153,951.78
6. Step 6: Final answer
   x = 123,350.74