Finding the Fourth Proportional to 102,728.32, 141,754.52 and 70,490.59

Step by Step Solution

1. Step 1: Write the proportion equation
   102,728.32 : 141,754.52 = 70,490.59 : x
2. Step 2: Convert to fraction form
   102,728.32/141,754.52 = 70,490.59/x
3. Step 3: Cross multiply
   102,728.32x = 141,754.52 × 70,490.59
4. Step 4: Simplify right side
   102,728.32x = 9,992,359,571.81
5. Step 5: Solve for x
   x = 9,992,359,571.81/102,728.32
6. Step 6: Final answer
   x = 97,269.77