Finding the Fourth Proportional to 5,191,428.58, 7,164,315.89 and 2,868,470.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,191,428.58 : 7,164,315.89 = 2,868,470.78 : x
2. Step 2: Convert to fraction form
   5,191,428.58/7,164,315.89 = 2,868,470.78/x
3. Step 3: Cross multiply
   5,191,428.58x = 7,164,315.89 × 2,868,470.78
4. Step 4: Simplify right side
   5,191,428.58x = 20,550,630,789,154.69
5. Step 5: Solve for x
   x = 20,550,630,789,154.69/5,191,428.58
6. Step 6: Final answer
   x = 3,958,569.49