Finding the Fourth Proportional to 140,979.34, 211,320.51 and 56,799.28

Step by Step Solution

1. Step 1: Write the proportion equation
   140,979.34 : 211,320.51 = 56,799.28 : x
2. Step 2: Convert to fraction form
   140,979.34/211,320.51 = 56,799.28/x
3. Step 3: Cross multiply
   140,979.34x = 211,320.51 × 56,799.28
4. Step 4: Simplify right side
   140,979.34x = 12,002,852,817.23
5. Step 5: Solve for x
   x = 12,002,852,817.23/140,979.34
6. Step 6: Final answer
   x = 85,139.09