Finding the Fourth Proportional to 20,853,404.10, 31,280,106.15 and 19,436,228.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,853,404.10 : 31,280,106.15 = 19,436,228.10 : x
2. Step 2: Convert to fraction form
   20,853,404.10/31,280,106.15 = 19,436,228.10/x
3. Step 3: Cross multiply
   20,853,404.10x = 31,280,106.15 × 19,436,228.10
4. Step 4: Simplify right side
   20,853,404.10x = 607,967,278,123,612.88
5. Step 5: Solve for x
   x = 607,967,278,123,612.88/20,853,404.10
6. Step 6: Final answer
   x = 29,154,342.15