Finding the Fourth Proportional to 1,247,978.34, 1,872,247.58 and 395,100.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,247,978.34 : 1,872,247.58 = 395,100.99 : x
2. Step 2: Convert to fraction form
   1,247,978.34/1,872,247.58 = 395,100.99/x
3. Step 3: Cross multiply
   1,247,978.34x = 1,872,247.58 × 395,100.99
4. Step 4: Simplify right side
   1,247,978.34x = 739,726,870,407.60
5. Step 5: Solve for x
   x = 739,726,870,407.60/1,247,978.34
6. Step 6: Final answer
   x = 592,740.15