Finding the Fourth Proportional to 37,654.64, 56,442.56 and 12,686.07

Step by Step Solution

1. Step 1: Write the proportion equation
   37,654.64 : 56,442.56 = 12,686.07 : x
2. Step 2: Convert to fraction form
   37,654.64/56,442.56 = 12,686.07/x
3. Step 3: Cross multiply
   37,654.64x = 56,442.56 × 12,686.07
4. Step 4: Simplify right side
   37,654.64x = 716,034,015.84
5. Step 5: Solve for x
   x = 716,034,015.84/37,654.64
6. Step 6: Final answer
   x = 19,015.82