Finding the Fourth Proportional to 89,672, 123,781.20 and 70,501.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89,672 : 123,781.20 = 70,501.76 : x
2. Step 2: Convert to fraction form
   89,672/123,781.20 = 70,501.76/x
3. Step 3: Cross multiply
   89,672x = 123,781.20 × 70,501.76
4. Step 4: Simplify right side
   89,672x = 8,726,792,454.91
5. Step 5: Solve for x
   x = 8,726,792,454.91/89,672
6. Step 6: Final answer
   x = 97,319.03