Finding the Fourth Proportional to 978,978.88, 1,350,969.60 and 565,516

Step by Step Solution

1. Step 1: Write the proportion equation
   978,978.88 : 1,350,969.60 = 565,516 : x
2. Step 2: Convert to fraction form
   978,978.88/1,350,969.60 = 565,516/x
3. Step 3: Cross multiply
   978,978.88x = 1,350,969.60 × 565,516
4. Step 4: Simplify right side
   978,978.88x = 763,994,924,313.60
5. Step 5: Solve for x
   x = 763,994,924,313.60/978,978.88
6. Step 6: Final answer
   x = 780,399.80