Finding the Fourth Proportional to 42,746.16, 64,132.14 and 12,761.37

Step by Step Solution

1. Step 1: Write the proportion equation
   42,746.16 : 64,132.14 = 12,761.37 : x
2. Step 2: Convert to fraction form
   42,746.16/64,132.14 = 12,761.37/x
3. Step 3: Cross multiply
   42,746.16x = 64,132.14 × 12,761.37
4. Step 4: Simplify right side
   42,746.16x = 818,413,967.43
5. Step 5: Solve for x
   x = 818,413,967.43/42,746.16
6. Step 6: Final answer
   x = 19,145.91