Finding the Fourth Proportional to 8,256,406.51, 12,379,703.58 and 3,139,211.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,256,406.51 : 12,379,703.58 = 3,139,211.05 : x
2. Step 2: Convert to fraction form
   8,256,406.51/12,379,703.58 = 3,139,211.05/x
3. Step 3: Cross multiply
   8,256,406.51x = 12,379,703.58 × 3,139,211.05
4. Step 4: Simplify right side
   8,256,406.51x = 38,862,502,274,060.55
5. Step 5: Solve for x
   x = 38,862,502,274,060.55/8,256,406.51
6. Step 6: Final answer
   x = 4,706,951.17