Finding the Fourth Proportional to 42,971,761.50, 64,459,421.01 and 12,679,624.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,971,761.50 : 64,459,421.01 = 12,679,624.50 : x
2. Step 2: Convert to fraction form
   42,971,761.50/64,459,421.01 = 12,679,624.50/x
3. Step 3: Cross multiply
   42,971,761.50x = 64,459,421.01 × 12,679,624.50
4. Step 4: Simplify right side
   42,971,761.50x = 817,321,253,894,210.75
5. Step 5: Solve for x
   x = 817,321,253,894,210.75/42,971,761.50
6. Step 6: Final answer
   x = 19,019,961.61