Finding the Fourth Proportional to 50,775.31, 70,047.86 and 30,620.99

Step by Step Solution

1. Step 1: Write the proportion equation
   50,775.31 : 70,047.86 = 30,620.99 : x
2. Step 2: Convert to fraction form
   50,775.31/70,047.86 = 30,620.99/x
3. Step 3: Cross multiply
   50,775.31x = 70,047.86 × 30,620.99
4. Step 4: Simplify right side
   50,775.31x = 2,144,934,820.58
5. Step 5: Solve for x
   x = 2,144,934,820.58/50,775.31
6. Step 6: Final answer
   x = 42,243.66