Finding the Fourth Proportional to 101,111.10, 151,569.45 and 78,609.30

Step by Step Solution

1. Step 1: Write the proportion equation
   101,111.10 : 151,569.45 = 78,609.30 : x
2. Step 2: Convert to fraction form
   101,111.10/151,569.45 = 78,609.30/x
3. Step 3: Cross multiply
   101,111.10x = 151,569.45 × 78,609.30
4. Step 4: Simplify right side
   101,111.10x = 11,914,768,365.89
5. Step 5: Solve for x
   x = 11,914,768,365.89/101,111.10
6. Step 6: Final answer
   x = 117,838.38