Finding the Fourth Proportional to 83,478.40, 115,199.92 and 45,238.10

Step by Step Solution

1. Step 1: Write the proportion equation
   83,478.40 : 115,199.92 = 45,238.10 : x
2. Step 2: Convert to fraction form
   83,478.40/115,199.92 = 45,238.10/x
3. Step 3: Cross multiply
   83,478.40x = 115,199.92 × 45,238.10
4. Step 4: Simplify right side
   83,478.40x = 5,211,424,981.50
5. Step 5: Solve for x
   x = 5,211,424,981.50/83,478.40
6. Step 6: Final answer
   x = 62,428.43