Finding the Fourth Proportional to 101,851.80, 140,551.31 and 56,531.69

Step by Step Solution

1. Step 1: Write the proportion equation
   101,851.80 : 140,551.31 = 56,531.69 : x
2. Step 2: Convert to fraction form
   101,851.80/140,551.31 = 56,531.69/x
3. Step 3: Cross multiply
   101,851.80x = 140,551.31 × 56,531.69
4. Step 4: Simplify right side
   101,851.80x = 7,945,603,051.65
5. Step 5: Solve for x
   x = 7,945,603,051.65/101,851.80
6. Step 6: Final answer
   x = 78,011.42