Finding the Fourth Proportional to 78,733,687.72, 118,106,698.38 and 21,225,078.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,733,687.72 : 118,106,698.38 = 21,225,078.76 : x
2. Step 2: Convert to fraction form
   78,733,687.72/118,106,698.38 = 21,225,078.76/x
3. Step 3: Cross multiply
   78,733,687.72x = 118,106,698.38 × 21,225,078.76
4. Step 4: Simplify right side
   78,733,687.72x = 2,506,823,975,199,064.50
5. Step 5: Solve for x
   x = 2,506,823,975,199,064.50/78,733,687.72
6. Step 6: Final answer
   x = 31,839,280.59