Finding the Fourth Proportional to 101,736.72, 140,397.89 and 56,415.29

Step by Step Solution

1. Step 1: Write the proportion equation
   101,736.72 : 140,397.89 = 56,415.29 : x
2. Step 2: Convert to fraction form
   101,736.72/140,397.89 = 56,415.29/x
3. Step 3: Cross multiply
   101,736.72x = 140,397.89 × 56,415.29
4. Step 4: Simplify right side
   101,736.72x = 7,920,586,695.67
5. Step 5: Solve for x
   x = 7,920,586,695.67/101,736.72
6. Step 6: Final answer
   x = 77,853.77