Finding the Fourth Proportional to 1,147,964.88, 1,584,191.52 and 638,667.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147,964.88 : 1,584,191.52 = 638,667.12 : x
2. Step 2: Convert to fraction form
   1,147,964.88/1,584,191.52 = 638,667.12/x
3. Step 3: Cross multiply
   1,147,964.88x = 1,584,191.52 × 638,667.12
4. Step 4: Simplify right side
   1,147,964.88x = 1,011,771,035,606.82
5. Step 5: Solve for x
   x = 1,011,771,035,606.82/1,147,964.88
6. Step 6: Final answer
   x = 881,360.62