Finding the Fourth Proportional to 1,200,175.79, 1,656,242.51 and 656,311.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,175.79 : 1,656,242.51 = 656,311.91 : x
2. Step 2: Convert to fraction form
   1,200,175.79/1,656,242.51 = 656,311.91/x
3. Step 3: Cross multiply
   1,200,175.79x = 1,656,242.51 × 656,311.91
4. Step 4: Simplify right side
   1,200,175.79x = 1,087,011,673,598.52
5. Step 5: Solve for x
   x = 1,087,011,673,598.52/1,200,175.79
6. Step 6: Final answer
   x = 905,710.39