Finding the Fourth Proportional to 89,062.56, 133,593.84 and 39,780

Step by Step Solution

1. Step 1: Write the proportion equation
   89,062.56 : 133,593.84 = 39,780 : x
2. Step 2: Convert to fraction form
   89,062.56/133,593.84 = 39,780/x
3. Step 3: Cross multiply
   89,062.56x = 133,593.84 × 39,780
4. Step 4: Simplify right side
   89,062.56x = 5,314,362,955.20
5. Step 5: Solve for x
   x = 5,314,362,955.20/89,062.56
6. Step 6: Final answer
   x = 59,670