Finding the Fourth Proportional to 1,215,889.89, 1,678,014.88 and 672,014.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,889.89 : 1,678,014.88 = 672,014.00 : x
2. Step 2: Convert to fraction form
   1,215,889.89/1,678,014.88 = 672,014.00/x
3. Step 3: Cross multiply
   1,215,889.89x = 1,678,014.88 × 672,014.00
4. Step 4: Simplify right side
   1,215,889.89x = 1,127,649,481,498.21
5. Step 5: Solve for x
   x = 1,127,649,481,498.21/1,215,889.89
6. Step 6: Final answer
   x = 927,427.30