Finding the Fourth Proportional to 89,819.70, 134,643.15 and 69,818.10

Step by Step Solution

1. Step 1: Write the proportion equation
   89,819.70 : 134,643.15 = 69,818.10 : x
2. Step 2: Convert to fraction form
   89,819.70/134,643.15 = 69,818.10/x
3. Step 3: Cross multiply
   89,819.70x = 134,643.15 × 69,818.10
4. Step 4: Simplify right side
   89,819.70x = 9,400,528,911.02
5. Step 5: Solve for x
   x = 9,400,528,911.02/89,819.70
6. Step 6: Final answer
   x = 104,659.99