Finding the Fourth Proportional to 90,551.39, 125,005.88 and 56,578.70

Step by Step Solution

1. Step 1: Write the proportion equation
   90,551.39 : 125,005.88 = 56,578.70 : x
2. Step 2: Convert to fraction form
   90,551.39/125,005.88 = 56,578.70/x
3. Step 3: Cross multiply
   90,551.39x = 125,005.88 × 56,578.70
4. Step 4: Simplify right side
   90,551.39x = 7,072,670,636.72
5. Step 5: Solve for x
   x = 7,072,670,636.72/90,551.39
6. Step 6: Final answer
   x = 78,106.71