Finding the Fourth Proportional to 1,285,665.32, 1,774,098.70 and 712,656.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,285,665.32 : 1,774,098.70 = 712,656.72 : x
2. Step 2: Convert to fraction form
   1,285,665.32/1,774,098.70 = 712,656.72/x
3. Step 3: Cross multiply
   1,285,665.32x = 1,774,098.70 × 712,656.72
4. Step 4: Simplify right side
   1,285,665.32x = 1,264,323,360,498.26
5. Step 5: Solve for x
   x = 1,264,323,360,498.26/1,285,665.32
6. Step 6: Final answer
   x = 983,400.07