Finding the Fourth Proportional to 30,677.48, 42,275.94 and 21,830.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,677.48 : 42,275.94 = 21,830.12 : x
2. Step 2: Convert to fraction form
   30,677.48/42,275.94 = 21,830.12/x
3. Step 3: Cross multiply
   30,677.48x = 42,275.94 × 21,830.12
4. Step 4: Simplify right side
   30,677.48x = 922,888,843.31
5. Step 5: Solve for x
   x = 922,888,843.31/30,677.48
6. Step 6: Final answer
   x = 30,083.59