Finding the Fourth Proportional to 5,181,987.81, 7,773,978.00 and 1,986,864.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,181,987.81 : 7,773,978.00 = 1,986,864.78 : x
2. Step 2: Convert to fraction form
   5,181,987.81/7,773,978.00 = 1,986,864.78/x
3. Step 3: Cross multiply
   5,181,987.81x = 7,773,978.00 × 1,986,864.78
4. Step 4: Simplify right side
   5,181,987.81x = 15,445,843,039,890.62
5. Step 5: Solve for x
   x = 15,445,843,039,890.62/5,181,987.81
6. Step 6: Final answer
   x = 2,980,679.16