Finding the Fourth Proportional to 140,978.34, 211,319.01 and 56,798.28

Step by Step Solution

1. Step 1: Write the proportion equation
   140,978.34 : 211,319.01 = 56,798.28 : x
2. Step 2: Convert to fraction form
   140,978.34/211,319.01 = 56,798.28/x
3. Step 3: Cross multiply
   140,978.34x = 211,319.01 × 56,798.28
4. Step 4: Simplify right side
   140,978.34x = 12,002,556,299.30
5. Step 5: Solve for x
   x = 12,002,556,299.30/140,978.34
6. Step 6: Final answer
   x = 85,137.59