Finding the Fourth Proportional to 101,100.92, 139,518.38 and 55,779.30

Step by Step Solution

1. Step 1: Write the proportion equation
   101,100.92 : 139,518.38 = 55,779.30 : x
2. Step 2: Convert to fraction form
   101,100.92/139,518.38 = 55,779.30/x
3. Step 3: Cross multiply
   101,100.92x = 139,518.38 × 55,779.30
4. Step 4: Simplify right side
   101,100.92x = 7,782,237,712.98
5. Step 5: Solve for x
   x = 7,782,237,712.98/101,100.92
6. Step 6: Final answer
   x = 76,974.95