Finding the Fourth Proportional to 42,892,982.27, 64,343,683.38 and 12,188,978.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,892,982.27 : 64,343,683.38 = 12,188,978.51 : x
2. Step 2: Convert to fraction form
   42,892,982.27/64,343,683.38 = 12,188,978.51/x
3. Step 3: Cross multiply
   42,892,982.27x = 64,343,683.38 × 12,188,978.51
4. Step 4: Simplify right side
   42,892,982.27x = 784,283,773,973,064.12
5. Step 5: Solve for x
   x = 784,283,773,973,064.12/42,892,982.27
6. Step 6: Final answer
   x = 18,284,664.12