Finding the Fourth Proportional to 83,690.49, 115,492.52 and 45,449.78

Step by Step Solution

1. Step 1: Write the proportion equation
   83,690.49 : 115,492.52 = 45,449.78 : x
2. Step 2: Convert to fraction form
   83,690.49/115,492.52 = 45,449.78/x
3. Step 3: Cross multiply
   83,690.49x = 115,492.52 × 45,449.78
4. Step 4: Simplify right side
   83,690.49x = 5,249,108,820.93
5. Step 5: Solve for x
   x = 5,249,108,820.93/83,690.49
6. Step 6: Final answer
   x = 62,720.49