Finding the Fourth Proportional to 78,719.86, 118,105.31 and 47,125

Step by Step Solution

1. Step 1: Write the proportion equation
   78,719.86 : 118,105.31 = 47,125 : x
2. Step 2: Convert to fraction form
   78,719.86/118,105.31 = 47,125/x
3. Step 3: Cross multiply
   78,719.86x = 118,105.31 × 47,125
4. Step 4: Simplify right side
   78,719.86x = 5,565,712,733.75
5. Step 5: Solve for x
   x = 5,565,712,733.75/78,719.86
6. Step 6: Final answer
   x = 70,702.78