Finding the Fourth Proportional to 103,943.56, 143,442.09 and 56,196.91

Step by Step Solution

1. Step 1: Write the proportion equation
   103,943.56 : 143,442.09 = 56,196.91 : x
2. Step 2: Convert to fraction form
   103,943.56/143,442.09 = 56,196.91/x
3. Step 3: Cross multiply
   103,943.56x = 143,442.09 × 56,196.91
4. Step 4: Simplify right side
   103,943.56x = 8,061,001,831.46
5. Step 5: Solve for x
   x = 8,061,001,831.46/103,943.56
6. Step 6: Final answer
   x = 77,551.72