Finding the Fourth Proportional to 69,136.88, 103,792.84 and 42,417.20

Step by Step Solution

1. Step 1: Write the proportion equation
   69,136.88 : 103,792.84 = 42,417.20 : x
2. Step 2: Convert to fraction form
   69,136.88/103,792.84 = 42,417.20/x
3. Step 3: Cross multiply
   69,136.88x = 103,792.84 × 42,417.20
4. Step 4: Simplify right side
   69,136.88x = 4,402,601,806.29
5. Step 5: Solve for x
   x = 4,402,601,806.29/69,136.88
6. Step 6: Final answer
   x = 63,679.50