Finding the Fourth Proportional to 42,846.96, 64,262.52 and 13,259.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,846.96 : 64,262.52 = 13,259.28 : x
2. Step 2: Convert to fraction form
   42,846.96/64,262.52 = 13,259.28/x
3. Step 3: Cross multiply
   42,846.96x = 64,262.52 × 13,259.28
4. Step 4: Simplify right side
   42,846.96x = 852,074,746.19
5. Step 5: Solve for x
   x = 852,074,746.19/42,846.96
6. Step 6: Final answer
   x = 19,886.47