Finding the Fourth Proportional to 123,215,392, 184,913,515.50 and 99,243,748.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,215,392 : 184,913,515.50 = 99,243,748.72 : x
2. Step 2: Convert to fraction form
   123,215,392/184,913,515.50 = 99,243,748.72/x
3. Step 3: Cross multiply
   123,215,392x = 184,913,515.50 × 99,243,748.72
4. Step 4: Simplify right side
   123,215,392x = 18,351,510,467,213,824
5. Step 5: Solve for x
   x = 18,351,510,467,213,824/123,215,392
6. Step 6: Final answer
   x = 148,938,457.84