Finding the Fourth Proportional to 42,892,981.77, 64,343,682.63 and 12,188,978.01

Step by Step Solution

1. Step 1: Write the proportion equation
   42,892,981.77 : 64,343,682.63 = 12,188,978.01 : x
2. Step 2: Convert to fraction form
   42,892,981.77/64,343,682.63 = 12,188,978.01/x
3. Step 3: Cross multiply
   42,892,981.77x = 64,343,682.63 × 12,188,978.01
4. Step 4: Simplify right side
   42,892,981.77x = 784,283,732,659,489
5. Step 5: Solve for x
   x = 784,283,732,659,489/42,892,981.77
6. Step 6: Final answer
   x = 18,284,663.37