Finding the Fourth Proportional to 2,788,391, 3,847,968.72 and 1,564,693.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,788,391 : 3,847,968.72 = 1,564,693.68 : x
2. Step 2: Convert to fraction form
   2,788,391/3,847,968.72 = 1,564,693.68/x
3. Step 3: Cross multiply
   2,788,391x = 3,847,968.72 × 1,564,693.68
4. Step 4: Simplify right side
   2,788,391x = 6,020,892,337,021.69
5. Step 5: Solve for x
   x = 6,020,892,337,021.69/2,788,391
6. Step 6: Final answer
   x = 2,159,271.18