Finding the Fourth Proportional to 7,178,996.88, 9,907,046.72 and 3,915,881.76

Step by Step Solution

1. Step 1: Write the proportion equation
   7,178,996.88 : 9,907,046.72 = 3,915,881.76 : x
2. Step 2: Convert to fraction form
   7,178,996.88/9,907,046.72 = 3,915,881.76/x
3. Step 3: Cross multiply
   7,178,996.88x = 9,907,046.72 × 3,915,881.76
4. Step 4: Simplify right side
   7,178,996.88x = 38,794,823,546,315.83
5. Step 5: Solve for x
   x = 38,794,823,546,315.83/7,178,996.88
6. Step 6: Final answer
   x = 5,403,933.75