Finding the Fourth Proportional to 77,897.72, 107,498.72 and 42,087.62

Step by Step Solution

1. Step 1: Write the proportion equation
   77,897.72 : 107,498.72 = 42,087.62 : x
2. Step 2: Convert to fraction form
   77,897.72/107,498.72 = 42,087.62/x
3. Step 3: Cross multiply
   77,897.72x = 107,498.72 × 42,087.62
4. Step 4: Simplify right side
   77,897.72x = 4,524,365,277.85
5. Step 5: Solve for x
   x = 4,524,365,277.85/77,897.72
6. Step 6: Final answer
   x = 58,080.84