Finding the Fourth Proportional to 89,658, 123,686.52 and 57,837.16

Step by Step Solution

1. Step 1: Write the proportion equation
   89,658 : 123,686.52 = 57,837.16 : x
2. Step 2: Convert to fraction form
   89,658/123,686.52 = 57,837.16/x
3. Step 3: Cross multiply
   89,658x = 123,686.52 × 57,837.16
4. Step 4: Simplify right side
   89,658x = 7,153,677,047.08
5. Step 5: Solve for x
   x = 7,153,677,047.08/89,658
6. Step 6: Final answer
   x = 79,788.50