Finding the Fourth Proportional to 83,378.17, 115,061 and 45,136.86

Step by Step Solution

1. Step 1: Write the proportion equation
   83,378.17 : 115,061 = 45,136.86 : x
2. Step 2: Convert to fraction form
   83,378.17/115,061 = 45,136.86/x
3. Step 3: Cross multiply
   83,378.17x = 115,061 × 45,136.86
4. Step 4: Simplify right side
   83,378.17x = 5,193,492,248.46
5. Step 5: Solve for x
   x = 5,193,492,248.46/83,378.17
6. Step 6: Final answer
   x = 62,288.39