Finding the Fourth Proportional to 78,181.87, 107,897.61 and 65,412.52

Step by Step Solution

1. Step 1: Write the proportion equation
   78,181.87 : 107,897.61 = 65,412.52 : x
2. Step 2: Convert to fraction form
   78,181.87/107,897.61 = 65,412.52/x
3. Step 3: Cross multiply
   78,181.87x = 107,897.61 × 65,412.52
4. Step 4: Simplify right side
   78,181.87x = 7,057,854,572.08
5. Step 5: Solve for x
   x = 7,057,854,572.08/78,181.87
6. Step 6: Final answer
   x = 90,274.82