Finding the Fourth Proportional to 8,429,158.82, 12,643,213.35 and 5,191,312.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429,158.82 : 12,643,213.35 = 5,191,312.61 : x
2. Step 2: Convert to fraction form
   8,429,158.82/12,643,213.35 = 5,191,312.61/x
3. Step 3: Cross multiply
   8,429,158.82x = 12,643,213.35 × 5,191,312.61
4. Step 4: Simplify right side
   8,429,158.82x = 65,634,872,945,850.80
5. Step 5: Solve for x
   x = 65,634,872,945,850.80/8,429,158.82
6. Step 6: Final answer
   x = 7,786,645.66