Finding the Fourth Proportional to 99,794,564.10, 149,691,846.15 and 72,920,708.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,794,564.10 : 149,691,846.15 = 72,920,708.10 : x
2. Step 2: Convert to fraction form
   99,794,564.10/149,691,846.15 = 72,920,708.10/x
3. Step 3: Cross multiply
   99,794,564.10x = 149,691,846.15 × 72,920,708.10
4. Step 4: Simplify right side
   99,794,564.10x = 10,915,635,418,054,258
5. Step 5: Solve for x
   x = 10,915,635,418,054,258/99,794,564.10
6. Step 6: Final answer
   x = 109,381,062.15