Finding the Fourth Proportional to 1,002.51, 1,502.73 and 386.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.51 : 1,502.73 = 386.01 : x
2. Step 2: Convert to fraction form
   1,002.51/1,502.73 = 386.01/x
3. Step 3: Cross multiply
   1,002.51x = 1,502.73 × 386.01
4. Step 4: Simplify right side
   1,002.51x = 580,068.81
5. Step 5: Solve for x
   x = 580,068.81/1,002.51
6. Step 6: Final answer
   x = 578.62