Finding the Fourth Proportional to 103,970.62, 143,479.46 and 56,223.98

Step by Step Solution

1. Step 1: Write the proportion equation
   103,970.62 : 143,479.46 = 56,223.98 : x
2. Step 2: Convert to fraction form
   103,970.62/143,479.46 = 56,223.98/x
3. Step 3: Cross multiply
   103,970.62x = 143,479.46 × 56,223.98
4. Step 4: Simplify right side
   103,970.62x = 8,066,985,712.61
5. Step 5: Solve for x
   x = 8,066,985,712.61/103,970.62
6. Step 6: Final answer
   x = 77,589.09