Finding the Fourth Proportional to 1,720,139.96, 2,580,218.20 and 522,072.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,720,139.96 : 2,580,218.20 = 522,072.67 : x
2. Step 2: Convert to fraction form
   1,720,139.96/2,580,218.20 = 522,072.67/x
3. Step 3: Cross multiply
   1,720,139.96x = 2,580,218.20 × 522,072.67
4. Step 4: Simplify right side
   1,720,139.96x = 1,347,061,404,856.59
5. Step 5: Solve for x
   x = 1,347,061,404,856.59/1,720,139.96
6. Step 6: Final answer
   x = 783,111.51