Finding the Fourth Proportional to 101,172, 139,620.24 and 56,462.88

Step by Step Solution

1. Step 1: Write the proportion equation
   101,172 : 139,620.24 = 56,462.88 : x
2. Step 2: Convert to fraction form
   101,172/139,620.24 = 56,462.88/x
3. Step 3: Cross multiply
   101,172x = 139,620.24 × 56,462.88
4. Step 4: Simplify right side
   101,172x = 7,883,360,856.69
5. Step 5: Solve for x
   x = 7,883,360,856.69/101,172
6. Step 6: Final answer
   x = 77,920.38