Finding the Fourth Proportional to 72,611,603.20, 108,768,105.60 and 49,918,124.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,611,603.20 : 108,768,105.60 = 49,918,124.80 : x
2. Step 2: Convert to fraction form
   72,611,603.20/108,768,105.60 = 49,918,124.80/x
3. Step 3: Cross multiply
   72,611,603.20x = 108,768,105.60 × 49,918,124.80
4. Step 4: Simplify right side
   72,611,603.20x = 5,429,499,869,600,378
5. Step 5: Solve for x
   x = 5,429,499,869,600,378/72,611,603.20
6. Step 6: Final answer
   x = 74,774,548.84