Finding the Fourth Proportional to 42,881.18, 64,328.00 and 13,301.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,881.18 : 64,328.00 = 13,301.40 : x
2. Step 2: Convert to fraction form
   42,881.18/64,328.00 = 13,301.40/x
3. Step 3: Cross multiply
   42,881.18x = 64,328.00 × 13,301.40
4. Step 4: Simplify right side
   42,881.18x = 855,652,392.69
5. Step 5: Solve for x
   x = 855,652,392.69/42,881.18
6. Step 6: Final answer
   x = 19,954.03