Finding the Fourth Proportional to 101,806.71, 140,488.52 and 56,484.20

Step by Step Solution

1. Step 1: Write the proportion equation
   101,806.71 : 140,488.52 = 56,484.20 : x
2. Step 2: Convert to fraction form
   101,806.71/140,488.52 = 56,484.20/x
3. Step 3: Cross multiply
   101,806.71x = 140,488.52 × 56,484.20
4. Step 4: Simplify right side
   101,806.71x = 7,935,380,676.52
5. Step 5: Solve for x
   x = 7,935,380,676.52/101,806.71
6. Step 6: Final answer
   x = 77,945.56