Finding the Fourth Proportional to 69,105.86, 103,521.65 and 53,255.88

Step by Step Solution

1. Step 1: Write the proportion equation
   69,105.86 : 103,521.65 = 53,255.88 : x
2. Step 2: Convert to fraction form
   69,105.86/103,521.65 = 53,255.88/x
3. Step 3: Cross multiply
   69,105.86x = 103,521.65 × 53,255.88
4. Step 4: Simplify right side
   69,105.86x = 5,513,136,303.52
5. Step 5: Solve for x
   x = 5,513,136,303.52/69,105.86
6. Step 6: Final answer
   x = 79,778.13