Finding the Fourth Proportional to 31,084,520.94, 42,879,418.18 and 21,805,905.53

Step by Step Solution

1. Step 1: Write the proportion equation
   31,084,520.94 : 42,879,418.18 = 21,805,905.53 : x
2. Step 2: Convert to fraction form
   31,084,520.94/42,879,418.18 = 21,805,905.53/x
3. Step 3: Cross multiply
   31,084,520.94x = 42,879,418.18 × 21,805,905.53
4. Step 4: Simplify right side
   31,084,520.94x = 935,024,542,014,444.62
5. Step 5: Solve for x
   x = 935,024,542,014,444.62/31,084,520.94
6. Step 6: Final answer
   x = 30,080,069.24