Finding the Fourth Proportional to 12,983,980, 17,918,419.98 and 7,182,661.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,983,980 : 17,918,419.98 = 7,182,661.72 : x
2. Step 2: Convert to fraction form
   12,983,980/17,918,419.98 = 7,182,661.72/x
3. Step 3: Cross multiply
   12,983,980x = 17,918,419.98 × 7,182,661.72
4. Step 4: Simplify right side
   12,983,980x = 128,701,949,273,229.17
5. Step 5: Solve for x
   x = 128,701,949,273,229.17/12,983,980
6. Step 6: Final answer
   x = 9,912,365.03