Finding the Fourth Proportional to 42,945.76, 64,411.12 and 11,356.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,945.76 : 64,411.12 = 11,356.12 : x
2. Step 2: Convert to fraction form
   42,945.76/64,411.12 = 11,356.12/x
3. Step 3: Cross multiply
   42,945.76x = 64,411.12 × 11,356.12
4. Step 4: Simplify right side
   42,945.76x = 731,460,408.05
5. Step 5: Solve for x
   x = 731,460,408.05/42,945.76
6. Step 6: Final answer
   x = 17,032.19