Finding the Fourth Proportional to 72,880.41, 109,320.63 and 56,264.70

Step by Step Solution

1. Step 1: Write the proportion equation
   72,880.41 : 109,320.63 = 56,264.70 : x
2. Step 2: Convert to fraction form
   72,880.41/109,320.63 = 56,264.70/x
3. Step 3: Cross multiply
   72,880.41x = 109,320.63 × 56,264.70
4. Step 4: Simplify right side
   72,880.41x = 6,150,892,450.76
5. Step 5: Solve for x
   x = 6,150,892,450.76/72,880.41
6. Step 6: Final answer
   x = 84,397.06