Finding the Fourth Proportional to 10,128,570.55, 13,978,757.91 and 5,776,659.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128,570.55 : 13,978,757.91 = 5,776,659.25 : x
2. Step 2: Convert to fraction form
   10,128,570.55/13,978,757.91 = 5,776,659.25/x
3. Step 3: Cross multiply
   10,128,570.55x = 13,978,757.91 × 5,776,659.25
4. Step 4: Simplify right side
   10,128,570.55x = 80,750,521,184,312.17
5. Step 5: Solve for x
   x = 80,750,521,184,312.17/10,128,570.55
6. Step 6: Final answer
   x = 7,972,548.62