Finding the Fourth Proportional to 1,488,498.18, 2,230,179.30 and 815,064.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488,498.18 : 2,230,179.30 = 815,064.18 : x
2. Step 2: Convert to fraction form
   1,488,498.18/2,230,179.30 = 815,064.18/x
3. Step 3: Cross multiply
   1,488,498.18x = 2,230,179.30 × 815,064.18
4. Step 4: Simplify right side
   1,488,498.18x = 1,817,739,262,407.47
5. Step 5: Solve for x
   x = 1,817,739,262,407.47/1,488,498.18
6. Step 6: Final answer
   x = 1,221,190.11