Finding the Fourth Proportional to 101,155, 139,598.28 and 56,443

Step by Step Solution

1. Step 1: Write the proportion equation
   101,155 : 139,598.28 = 56,443 : x
2. Step 2: Convert to fraction form
   101,155/139,598.28 = 56,443/x
3. Step 3: Cross multiply
   101,155x = 139,598.28 × 56,443
4. Step 4: Simplify right side
   101,155x = 7,879,345,718.04
5. Step 5: Solve for x
   x = 7,879,345,718.04/101,155
6. Step 6: Final answer
   x = 77,893.78