Finding the Fourth Proportional to 42,876.47, 64,314.14 and 13,294.33

Step by Step Solution

1. Step 1: Write the proportion equation
   42,876.47 : 64,314.14 = 13,294.33 : x
2. Step 2: Convert to fraction form
   42,876.47/64,314.14 = 13,294.33/x
3. Step 3: Cross multiply
   42,876.47x = 64,314.14 × 13,294.33
4. Step 4: Simplify right side
   42,876.47x = 855,013,173.57
5. Step 5: Solve for x
   x = 855,013,173.57/42,876.47
6. Step 6: Final answer
   x = 19,941.31