Finding the Fourth Proportional to 43,010.84, 64,531.42 and 13,436.12

Step by Step Solution

1. Step 1: Write the proportion equation
   43,010.84 : 64,531.42 = 13,436.12 : x
2. Step 2: Convert to fraction form
   43,010.84/64,531.42 = 13,436.12/x
3. Step 3: Cross multiply
   43,010.84x = 64,531.42 × 13,436.12
4. Step 4: Simplify right side
   43,010.84x = 867,051,902.89
5. Step 5: Solve for x
   x = 867,051,902.89/43,010.84
6. Step 6: Final answer
   x = 20,158.92