Finding the Fourth Proportional to 99,931,978.10, 149,674,018.35 and 82,016,074.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,931,978.10 : 149,674,018.35 = 82,016,074.10 : x
2. Step 2: Convert to fraction form
   99,931,978.10/149,674,018.35 = 82,016,074.10/x
3. Step 3: Cross multiply
   99,931,978.10x = 149,674,018.35 × 82,016,074.10
4. Step 4: Simplify right side
   99,931,978.10x = 12,275,675,379,838,358
5. Step 5: Solve for x
   x = 12,275,675,379,838,358/99,931,978.10
6. Step 6: Final answer
   x = 122,840,312.11