Finding the Fourth Proportional to 113,430.72, 156,549.24 and 65,051.60

Step by Step Solution

1. Step 1: Write the proportion equation
   113,430.72 : 156,549.24 = 65,051.60 : x
2. Step 2: Convert to fraction form
   113,430.72/156,549.24 = 65,051.60/x
3. Step 3: Cross multiply
   113,430.72x = 156,549.24 × 65,051.60
4. Step 4: Simplify right side
   113,430.72x = 10,183,778,540.78
5. Step 5: Solve for x
   x = 10,183,778,540.78/113,430.72
6. Step 6: Final answer
   x = 89,779.72