Finding the Fourth Proportional to 1,244,091.60, 1,866,433.50 and 402,643.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,244,091.60 : 1,866,433.50 = 402,643.34 : x
2. Step 2: Convert to fraction form
   1,244,091.60/1,866,433.50 = 402,643.34/x
3. Step 3: Cross multiply
   1,244,091.60x = 1,866,433.50 × 402,643.34
4. Step 4: Simplify right side
   1,244,091.60x = 751,507,018,327.89
5. Step 5: Solve for x
   x = 751,507,018,327.89/1,244,091.60
6. Step 6: Final answer
   x = 604,060.84