Finding the Fourth Proportional to 101,061.60, 151,495.20 and 78,559.80

Step by Step Solution

1. Step 1: Write the proportion equation
   101,061.60 : 151,495.20 = 78,559.80 : x
2. Step 2: Convert to fraction form
   101,061.60/151,495.20 = 78,559.80/x
3. Step 3: Cross multiply
   101,061.60x = 151,495.20 × 78,559.80
4. Step 4: Simplify right side
   101,061.60x = 11,901,432,612.96
5. Step 5: Solve for x
   x = 11,901,432,612.96/101,061.60
6. Step 6: Final answer
   x = 117,764.14