Finding the Fourth Proportional to 101,345.91, 139,851.27 and 56,021.19

Step by Step Solution

1. Step 1: Write the proportion equation
   101,345.91 : 139,851.27 = 56,021.19 : x
2. Step 2: Convert to fraction form
   101,345.91/139,851.27 = 56,021.19/x
3. Step 3: Cross multiply
   101,345.91x = 139,851.27 × 56,021.19
4. Step 4: Simplify right side
   101,345.91x = 7,834,634,568.41
5. Step 5: Solve for x
   x = 7,834,634,568.41/101,345.91
6. Step 6: Final answer
   x = 77,305.88