Finding the Fourth Proportional to 89,641, 123,738.42 and 70,470.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89,641 : 123,738.42 = 70,470.76 : x
2. Step 2: Convert to fraction form
   89,641/123,738.42 = 70,470.76/x
3. Step 3: Cross multiply
   89,641x = 123,738.42 × 70,470.76
4. Step 4: Simplify right side
   89,641x = 8,719,940,498.60
5. Step 5: Solve for x
   x = 8,719,940,498.60/89,641
6. Step 6: Final answer
   x = 97,276.25