Finding the Fourth Proportional to 100,844.72, 139,164.36 and 56,132.72

Step by Step Solution

1. Step 1: Write the proportion equation
   100,844.72 : 139,164.36 = 56,132.72 : x
2. Step 2: Convert to fraction form
   100,844.72/139,164.36 = 56,132.72/x
3. Step 3: Cross multiply
   100,844.72x = 139,164.36 × 56,132.72
4. Step 4: Simplify right side
   100,844.72x = 7,811,674,053.86
5. Step 5: Solve for x
   x = 7,811,674,053.86/100,844.72
6. Step 6: Final answer
   x = 77,462.40