Finding the Fourth Proportional to 78,412.86, 108,209.88 and 42,602.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,412.86 : 108,209.88 = 42,602.94 : x
2. Step 2: Convert to fraction form
   78,412.86/108,209.88 = 42,602.94/x
3. Step 3: Cross multiply
   78,412.86x = 108,209.88 × 42,602.94
4. Step 4: Simplify right side
   78,412.86x = 4,610,059,025.05
5. Step 5: Solve for x
   x = 4,610,059,025.05/78,412.86
6. Step 6: Final answer
   x = 58,792.13