Finding the Fourth Proportional to 42,892,982.82, 64,343,684.16 and 12,188,979

Step by Step Solution

1. Step 1: Write the proportion equation
   42,892,982.82 : 64,343,684.16 = 12,188,979 : x
2. Step 2: Convert to fraction form
   42,892,982.82/64,343,684.16 = 12,188,979/x
3. Step 3: Cross multiply
   42,892,982.82x = 64,343,684.16 × 12,188,979
4. Step 4: Simplify right side
   42,892,982.82x = 784,283,815,008,872.62
5. Step 5: Solve for x
   x = 784,283,815,008,872.62/42,892,982.82
6. Step 6: Final answer
   x = 18,284,664.84