Finding the Fourth Proportional to 1,090,276.16, 1,634,820.72 and 380,113.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090,276.16 : 1,634,820.72 = 380,113.28 : x
2. Step 2: Convert to fraction form
   1,090,276.16/1,634,820.72 = 380,113.28/x
3. Step 3: Cross multiply
   1,090,276.16x = 1,634,820.72 × 380,113.28
4. Step 4: Simplify right side
   1,090,276.16x = 621,417,066,091.16
5. Step 5: Solve for x
   x = 621,417,066,091.16/1,090,276.16
6. Step 6: Final answer
   x = 569,963.00