Finding the Fourth Proportional to 78,199.83, 107,915.69 and 42,389.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,199.83 : 107,915.69 = 42,389.53 : x
2. Step 2: Convert to fraction form
   78,199.83/107,915.69 = 42,389.53/x
3. Step 3: Cross multiply
   78,199.83x = 107,915.69 × 42,389.53
4. Step 4: Simplify right side
   78,199.83x = 4,574,495,214.91
5. Step 5: Solve for x
   x = 4,574,495,214.91/78,199.83
6. Step 6: Final answer
   x = 58,497.51