Finding the Fourth Proportional to 2,590,987.90, 3,886,979.99 and 993,426.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590,987.90 : 3,886,979.99 = 993,426.39 : x
2. Step 2: Convert to fraction form
   2,590,987.90/3,886,979.99 = 993,426.39/x
3. Step 3: Cross multiply
   2,590,987.90x = 3,886,979.99 × 993,426.39
4. Step 4: Simplify right side
   2,590,987.90x = 3,861,428,501,951.50
5. Step 5: Solve for x
   x = 3,861,428,501,951.50/2,590,987.90
6. Step 6: Final answer
   x = 1,490,330.58