Finding the Fourth Proportional to 12,921,475.68, 17,832,499.38 and 7,120,256.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921,475.68 : 17,832,499.38 = 7,120,256.52 : x
2. Step 2: Convert to fraction form
   12,921,475.68/17,832,499.38 = 7,120,256.52/x
3. Step 3: Cross multiply
   12,921,475.68x = 17,832,499.38 × 7,120,256.52
4. Step 4: Simplify right side
   12,921,475.68x = 126,971,969,978,340.94
5. Step 5: Solve for x
   x = 126,971,969,978,340.94/12,921,475.68
6. Step 6: Final answer
   x = 9,826,429.51