Finding the Fourth Proportional to 101,945.20, 140,679.69 and 56,626.06

Step by Step Solution

1. Step 1: Write the proportion equation
   101,945.20 : 140,679.69 = 56,626.06 : x
2. Step 2: Convert to fraction form
   101,945.20/140,679.69 = 56,626.06/x
3. Step 3: Cross multiply
   101,945.20x = 140,679.69 × 56,626.06
4. Step 4: Simplify right side
   101,945.20x = 7,966,136,566.72
5. Step 5: Solve for x
   x = 7,966,136,566.72/101,945.20
6. Step 6: Final answer
   x = 78,141.36