Finding the Fourth Proportional to 978,825,713.62, 1,350,621,432.93 and 561,061,124.50

Step by Step Solution

1. Step 1: Write the proportion equation
   978,825,713.62 : 1,350,621,432.93 = 561,061,124.50 : x
2. Step 2: Convert to fraction form
   978,825,713.62/1,350,621,432.93 = 561,061,124.50/x
3. Step 3: Cross multiply
   978,825,713.62x = 1,350,621,432.93 × 561,061,124.50
4. Step 4: Simplify right side
   978,825,713.62x = 757,781,179,933,507,200
5. Step 5: Solve for x
   x = 757,781,179,933,507,200/978,825,713.62
6. Step 6: Final answer
   x = 774,173,756.77