Finding the Fourth Proportional to 78,639.30, 108,523.53 and 42,830.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,639.30 : 108,523.53 = 42,830.01 : x
2. Step 2: Convert to fraction form
   78,639.30/108,523.53 = 42,830.01/x
3. Step 3: Cross multiply
   78,639.30x = 108,523.53 × 42,830.01
4. Step 4: Simplify right side
   78,639.30x = 4,648,063,875.14
5. Step 5: Solve for x
   x = 4,648,063,875.14/78,639.30
6. Step 6: Final answer
   x = 59,106.12