Finding the Fourth Proportional to 8,200,156.92, 12,300,279.18 and 5,378,139.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,200,156.92 : 12,300,279.18 = 5,378,139.60 : x
2. Step 2: Convert to fraction form
   8,200,156.92/12,300,279.18 = 5,378,139.60/x
3. Step 3: Cross multiply
   8,200,156.92x = 12,300,279.18 × 5,378,139.60
4. Step 4: Simplify right side
   8,200,156.92x = 66,152,618,549,013.52
5. Step 5: Solve for x
   x = 66,152,618,549,013.52/8,200,156.92
6. Step 6: Final answer
   x = 8,067,238.13