Finding the Fourth Proportional to 12,985,459.76, 17,925,674.28 and 7,760,311.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,985,459.76 : 17,925,674.28 = 7,760,311.76 : x
2. Step 2: Convert to fraction form
   12,985,459.76/17,925,674.28 = 7,760,311.76/x
3. Step 3: Cross multiply
   12,985,459.76x = 17,925,674.28 × 7,760,311.76
4. Step 4: Simplify right side
   12,985,459.76x = 139,108,820,921,013.53
5. Step 5: Solve for x
   x = 139,108,820,921,013.53/12,985,459.76
6. Step 6: Final answer
   x = 10,712,660.43