Finding the Fourth Proportional to 101,811, 140,498.98 and 56,495.88

Step by Step Solution

1. Step 1: Write the proportion equation
   101,811 : 140,498.98 = 56,495.88 : x
2. Step 2: Convert to fraction form
   101,811/140,498.98 = 56,495.88/x
3. Step 3: Cross multiply
   101,811x = 140,498.98 × 56,495.88
4. Step 4: Simplify right side
   101,811x = 7,937,613,514.20
5. Step 5: Solve for x
   x = 7,937,613,514.20/101,811
6. Step 6: Final answer
   x = 77,964.20