Finding the Fourth Proportional to 1,272,587.52, 1,908,869.76 and 386,123.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272,587.52 : 1,908,869.76 = 386,123.52 : x
2. Step 2: Convert to fraction form
   1,272,587.52/1,908,869.76 = 386,123.52/x
3. Step 3: Cross multiply
   1,272,587.52x = 1,908,869.76 × 386,123.52
4. Step 4: Simplify right side
   1,272,587.52x = 737,059,510,952.76
5. Step 5: Solve for x
   x = 737,059,510,952.76/1,272,587.52
6. Step 6: Final answer
   x = 579,181.78