Finding the Fourth Proportional to 89,566.30, 123,656.72 and 61,642.58

Step by Step Solution

1. Step 1: Write the proportion equation
   89,566.30 : 123,656.72 = 61,642.58 : x
2. Step 2: Convert to fraction form
   89,566.30/123,656.72 = 61,642.58/x
3. Step 3: Cross multiply
   89,566.30x = 123,656.72 × 61,642.58
4. Step 4: Simplify right side
   89,566.30x = 7,622,519,501.50
5. Step 5: Solve for x
   x = 7,622,519,501.50/89,566.30
6. Step 6: Final answer
   x = 85,104.77