Finding the Fourth Proportional to 103,847.31, 143,309.10 and 56,100.51

Step by Step Solution

1. Step 1: Write the proportion equation
   103,847.31 : 143,309.10 = 56,100.51 : x
2. Step 2: Convert to fraction form
   103,847.31/143,309.10 = 56,100.51/x
3. Step 3: Cross multiply
   103,847.31x = 143,309.10 × 56,100.51
4. Step 4: Simplify right side
   103,847.31x = 8,039,713,597.64
5. Step 5: Solve for x
   x = 8,039,713,597.64/103,847.31
6. Step 6: Final answer
   x = 77,418.60