Finding the Fourth Proportional to 2,590,987.71, 3,886,979.71 and 993,426.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590,987.71 : 3,886,979.71 = 993,426.20 : x
2. Step 2: Convert to fraction form
   2,590,987.71/3,886,979.71 = 993,426.20/x
3. Step 3: Cross multiply
   2,590,987.71x = 3,886,979.71 × 993,426.20
4. Step 4: Simplify right side
   2,590,987.71x = 3,861,427,495,604.31
5. Step 5: Solve for x
   x = 3,861,427,495,604.31/2,590,987.71
6. Step 6: Final answer
   x = 1,490,330.30