Finding the Fourth Proportional to 1,147,499.34, 1,583,605.17 and 638,190.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147,499.34 : 1,583,605.17 = 638,190.78 : x
2. Step 2: Convert to fraction form
   1,147,499.34/1,583,605.17 = 638,190.78/x
3. Step 3: Cross multiply
   1,147,499.34x = 1,583,605.17 × 638,190.78
4. Step 4: Simplify right side
   1,147,499.34x = 1,010,642,218,654.33
5. Step 5: Solve for x
   x = 1,010,642,218,654.33/1,147,499.34
6. Step 6: Final answer
   x = 880,734.47