Finding the Fourth Proportional to 81,780,123.30, 122,565,986.55 and 43,459,995.30

Step by Step Solution

1. Step 1: Write the proportion equation
   81,780,123.30 : 122,565,986.55 = 43,459,995.30 : x
2. Step 2: Convert to fraction form
   81,780,123.30/122,565,986.55 = 43,459,995.30/x
3. Step 3: Cross multiply
   81,780,123.30x = 122,565,986.55 × 43,459,995.30
4. Step 4: Simplify right side
   81,780,123.30x = 5,326,717,199,402,863
5. Step 5: Solve for x
   x = 5,326,717,199,402,863/81,780,123.30
6. Step 6: Final answer
   x = 65,134,619.32