Finding the Fourth Proportional to 101,799.24, 140,499.81 and 56,491.78

Step by Step Solution

1. Step 1: Write the proportion equation
   101,799.24 : 140,499.81 = 56,491.78 : x
2. Step 2: Convert to fraction form
   101,799.24/140,499.81 = 56,491.78/x
3. Step 3: Cross multiply
   101,799.24x = 140,499.81 × 56,491.78
4. Step 4: Simplify right side
   101,799.24x = 7,937,084,005.31
5. Step 5: Solve for x
   x = 7,937,084,005.31/101,799.24
6. Step 6: Final answer
   x = 77,968.01