Finding the Fourth Proportional to 101,365.56, 139,889.36 and 56,042.72

Step by Step Solution

1. Step 1: Write the proportion equation
   101,365.56 : 139,889.36 = 56,042.72 : x
2. Step 2: Convert to fraction form
   101,365.56/139,889.36 = 56,042.72/x
3. Step 3: Cross multiply
   101,365.56x = 139,889.36 × 56,042.72
4. Step 4: Simplify right side
   101,365.56x = 7,839,780,233.46
5. Step 5: Solve for x
   x = 7,839,780,233.46/101,365.56
6. Step 6: Final answer
   x = 77,341.66