Finding the Fourth Proportional to 89,748.12, 123,779.70 and 78,969.72

Step by Step Solution

1. Step 1: Write the proportion equation
   89,748.12 : 123,779.70 = 78,969.72 : x
2. Step 2: Convert to fraction form
   89,748.12/123,779.70 = 78,969.72/x
3. Step 3: Cross multiply
   89,748.12x = 123,779.70 × 78,969.72
4. Step 4: Simplify right side
   89,748.12x = 9,774,848,250.68
5. Step 5: Solve for x
   x = 9,774,848,250.68/89,748.12
6. Step 6: Final answer
   x = 108,914.24