Finding the Fourth Proportional to 1,146,888.12, 1,719,667.98 and 388,475.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146,888.12 : 1,719,667.98 = 388,475.40 : x
2. Step 2: Convert to fraction form
   1,146,888.12/1,719,667.98 = 388,475.40/x
3. Step 3: Cross multiply
   1,146,888.12x = 1,719,667.98 × 388,475.40
4. Step 4: Simplify right side
   1,146,888.12x = 668,048,706,397.69
5. Step 5: Solve for x
   x = 668,048,706,397.69/1,146,888.12
6. Step 6: Final answer
   x = 582,488.12