Finding the Fourth Proportional to 89,886, 134,145.48 and 79,921.80

Step by Step Solution

1. Step 1: Write the proportion equation
   89,886 : 134,145.48 = 79,921.80 : x
2. Step 2: Convert to fraction form
   89,886/134,145.48 = 79,921.80/x
3. Step 3: Cross multiply
   89,886x = 134,145.48 × 79,921.80
4. Step 4: Simplify right side
   89,886x = 10,721,148,223.46
5. Step 5: Solve for x
   x = 10,721,148,223.46/89,886
6. Step 6: Final answer
   x = 119,274.95