Finding the Fourth Proportional to 89,841.69, 123,981.30 and 51,603.75

Step by Step Solution

1. Step 1: Write the proportion equation
   89,841.69 : 123,981.30 = 51,603.75 : x
2. Step 2: Convert to fraction form
   89,841.69/123,981.30 = 51,603.75/x
3. Step 3: Cross multiply
   89,841.69x = 123,981.30 × 51,603.75
4. Step 4: Simplify right side
   89,841.69x = 6,397,900,009.88
5. Step 5: Solve for x
   x = 6,397,900,009.88/89,841.69
6. Step 6: Final answer
   x = 71,213.04