Finding the Fourth Proportional to 13,341,978.34, 18,413,904.54 and 8,447,654.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,341,978.34 : 18,413,904.54 = 8,447,654.56 : x
2. Step 2: Convert to fraction form
   13,341,978.34/18,413,904.54 = 8,447,654.56/x
3. Step 3: Cross multiply
   13,341,978.34x = 18,413,904.54 × 8,447,654.56
4. Step 4: Simplify right side
   13,341,978.34x = 155,554,304,654,735.72
5. Step 5: Solve for x
   x = 155,554,304,654,735.72/13,341,978.34
6. Step 6: Final answer
   x = 11,659,013.43