Finding the Fourth Proportional to 101,769.43, 140,436.86 and 56,443.40

Step by Step Solution

1. Step 1: Write the proportion equation
   101,769.43 : 140,436.86 = 56,443.40 : x
2. Step 2: Convert to fraction form
   101,769.43/140,436.86 = 56,443.40/x
3. Step 3: Cross multiply
   101,769.43x = 140,436.86 × 56,443.40
4. Step 4: Simplify right side
   101,769.43x = 7,926,732,879.32
5. Step 5: Solve for x
   x = 7,926,732,879.32/101,769.43
6. Step 6: Final answer
   x = 77,889.14