Finding the Fourth Proportional to 101,685.24, 140,322.78 and 56,361.42

Step by Step Solution

1. Step 1: Write the proportion equation
   101,685.24 : 140,322.78 = 56,361.42 : x
2. Step 2: Convert to fraction form
   101,685.24/140,322.78 = 56,361.42/x
3. Step 3: Cross multiply
   101,685.24x = 140,322.78 × 56,361.42
4. Step 4: Simplify right side
   101,685.24x = 7,908,791,139.15
5. Step 5: Solve for x
   x = 7,908,791,139.15/101,685.24
6. Step 6: Final answer
   x = 77,777.18