Finding the Fourth Proportional to 78,131.40, 107,813.61 and 43,669.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,131.40 : 107,813.61 = 43,669.68 : x
2. Step 2: Convert to fraction form
   78,131.40/107,813.61 = 43,669.68/x
3. Step 3: Cross multiply
   78,131.40x = 107,813.61 × 43,669.68
4. Step 4: Simplify right side
   78,131.40x = 4,708,185,848.34
5. Step 5: Solve for x
   x = 4,708,185,848.34/78,131.40
6. Step 6: Final answer
   x = 60,259.84