Finding the Fourth Proportional to 9,300.77, 12,820.29 and 7,307.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,300.77 : 12,820.29 = 7,307.90 : x
2. Step 2: Convert to fraction form
   9,300.77/12,820.29 = 7,307.90/x
3. Step 3: Cross multiply
   9,300.77x = 12,820.29 × 7,307.90
4. Step 4: Simplify right side
   9,300.77x = 93,689,397.29
5. Step 5: Solve for x
   x = 93,689,397.29/9,300.77
6. Step 6: Final answer
   x = 10,073.29