Finding the Fourth Proportional to 10,138,503.12, 15,208,689.78 and 3,315,111.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,138,503.12 : 15,208,689.78 = 3,315,111.42 : x
2. Step 2: Convert to fraction form
   10,138,503.12/15,208,689.78 = 3,315,111.42/x
3. Step 3: Cross multiply
   10,138,503.12x = 15,208,689.78 × 3,315,111.42
4. Step 4: Simplify right side
   10,138,503.12x = 50,418,501,172,915.28
5. Step 5: Solve for x
   x = 50,418,501,172,915.28/10,138,503.12
6. Step 6: Final answer
   x = 4,972,972.89