Finding the Fourth Proportional to 1,012,538.84, 1,518,058.38 and 613,085.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012,538.84 : 1,518,058.38 = 613,085.72 : x
2. Step 2: Convert to fraction form
   1,012,538.84/1,518,058.38 = 613,085.72/x
3. Step 3: Cross multiply
   1,012,538.84x = 1,518,058.38 × 613,085.72
4. Step 4: Simplify right side
   1,012,538.84x = 930,699,914,904.33
5. Step 5: Solve for x
   x = 930,699,914,904.33/1,012,538.84
6. Step 6: Final answer
   x = 919,174.53