Finding the Fourth Proportional to 99,788.52, 149,747.64 and 53,074.20

Step by Step Solution

1. Step 1: Write the proportion equation
   99,788.52 : 149,747.64 = 53,074.20 : x
2. Step 2: Convert to fraction form
   99,788.52/149,747.64 = 53,074.20/x
3. Step 3: Cross multiply
   99,788.52x = 149,747.64 × 53,074.20
4. Step 4: Simplify right side
   99,788.52x = 7,947,736,194.89
5. Step 5: Solve for x
   x = 7,947,736,194.89/99,788.52
6. Step 6: Final answer
   x = 79,645.80