Finding the Fourth Proportional to 12,921,704.64, 17,832,071.98 and 7,120,693.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921,704.64 : 17,832,071.98 = 7,120,693.98 : x
2. Step 2: Convert to fraction form
   12,921,704.64/17,832,071.98 = 7,120,693.98/x
3. Step 3: Cross multiply
   12,921,704.64x = 17,832,071.98 × 7,120,693.98
4. Step 4: Simplify right side
   12,921,704.64x = 126,976,727,598,912.69
5. Step 5: Solve for x
   x = 126,976,727,598,912.69/12,921,704.64
6. Step 6: Final answer
   x = 9,826,623.59