Finding the Fourth Proportional to 103,820.38, 143,272.16 and 56,073.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,820.38 : 143,272.16 = 56,073.72 : x
2. Step 2: Convert to fraction form
   103,820.38/143,272.16 = 56,073.72/x
3. Step 3: Cross multiply
   103,820.38x = 143,272.16 × 56,073.72
4. Step 4: Simplify right side
   103,820.38x = 8,033,802,983.64
5. Step 5: Solve for x
   x = 8,033,802,983.64/103,820.38
6. Step 6: Final answer
   x = 77,381.75