Finding the Fourth Proportional to 1,147,026.88, 1,582,985.76 and 688,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147,026.88 : 1,582,985.76 = 688,158.72 : x
2. Step 2: Convert to fraction form
   1,147,026.88/1,582,985.76 = 688,158.72/x
3. Step 3: Cross multiply
   1,147,026.88x = 1,582,985.76 × 688,158.72
4. Step 4: Simplify right side
   1,147,026.88x = 1,089,345,454,379.83
5. Step 5: Solve for x
   x = 1,089,345,454,379.83/1,147,026.88
6. Step 6: Final answer
   x = 949,712.23