Finding the Fourth Proportional to 100,405,262.67, 149,931,763.39 and 81,997,723.98

Step by Step Solution

1. Step 1: Write the proportion equation
   100,405,262.67 : 149,931,763.39 = 81,997,723.98 : x
2. Step 2: Convert to fraction form
   100,405,262.67/149,931,763.39 = 81,997,723.98/x
3. Step 3: Cross multiply
   100,405,262.67x = 149,931,763.39 × 81,997,723.98
4. Step 4: Simplify right side
   100,405,262.67x = 12,294,063,349,828,142
5. Step 5: Solve for x
   x = 12,294,063,349,828,142/100,405,262.67
6. Step 6: Final answer
   x = 122,444,412.01