Finding the Fourth Proportional to 89,657.34, 123,685.56 and 57,836.49

Step by Step Solution

1. Step 1: Write the proportion equation
   89,657.34 : 123,685.56 = 57,836.49 : x
2. Step 2: Convert to fraction form
   89,657.34/123,685.56 = 57,836.49/x
3. Step 3: Cross multiply
   89,657.34x = 123,685.56 × 57,836.49
4. Step 4: Simplify right side
   89,657.34x = 7,153,538,654.08
5. Step 5: Solve for x
   x = 7,153,538,654.08/89,657.34
6. Step 6: Final answer
   x = 79,787.54