Finding the Fourth Proportional to 2,113,329.86, 2,916,395.22 and 1,207,931.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113,329.86 : 2,916,395.22 = 1,207,931.30 : x
2. Step 2: Convert to fraction form
   2,113,329.86/2,916,395.22 = 1,207,931.30/x
3. Step 3: Cross multiply
   2,113,329.86x = 2,916,395.22 × 1,207,931.30
4. Step 4: Simplify right side
   2,113,329.86x = 3,522,805,069,408.39
5. Step 5: Solve for x
   x = 3,522,805,069,408.39/2,113,329.86
6. Step 6: Final answer
   x = 1,666,945.20