Finding the Fourth Proportional to 1,680,978.54, 2,521,128.78 and 615,656.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680,978.54 : 2,521,128.78 = 615,656.82 : x
2. Step 2: Convert to fraction form
   1,680,978.54/2,521,128.78 = 615,656.82/x
3. Step 3: Cross multiply
   1,680,978.54x = 2,521,128.78 × 615,656.82
4. Step 4: Simplify right side
   1,680,978.54x = 1,552,150,127,505.28
5. Step 5: Solve for x
   x = 1,552,150,127,505.28/1,680,978.54
6. Step 6: Final answer
   x = 923,361.06