Finding the Fourth Proportional to 101,739, 140,397.42 and 56,416.56

Step by Step Solution

1. Step 1: Write the proportion equation
   101,739 : 140,397.42 = 56,416.56 : x
2. Step 2: Convert to fraction form
   101,739/140,397.42 = 56,416.56/x
3. Step 3: Cross multiply
   101,739x = 140,397.42 × 56,416.56
4. Step 4: Simplify right side
   101,739x = 7,920,739,469.28
5. Step 5: Solve for x
   x = 7,920,739,469.28/101,739
6. Step 6: Final answer
   x = 77,853.52