Finding the Fourth Proportional to 864,096.90, 1,296,145.35 and 780,116.10

Step by Step Solution

1. Step 1: Write the proportion equation
   864,096.90 : 1,296,145.35 = 780,116.10 : x
2. Step 2: Convert to fraction form
   864,096.90/1,296,145.35 = 780,116.10/x
3. Step 3: Cross multiply
   864,096.90x = 1,296,145.35 × 780,116.10
4. Step 4: Simplify right side
   864,096.90x = 1,011,143,855,475.14
5. Step 5: Solve for x
   x = 1,011,143,855,475.14/864,096.90
6. Step 6: Final answer
   x = 1,170,174.15