Finding the Fourth Proportional to 42,864,656.48, 64,300,822.96 and 12,159,526.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,864,656.48 : 64,300,822.96 = 12,159,526.40 : x
2. Step 2: Convert to fraction form
   42,864,656.48/64,300,822.96 = 12,159,526.40/x
3. Step 3: Cross multiply
   42,864,656.48x = 64,300,822.96 × 12,159,526.40
4. Step 4: Simplify right side
   42,864,656.48x = 781,867,554,323,846.12
5. Step 5: Solve for x
   x = 781,867,554,323,846.12/42,864,656.48
6. Step 6: Final answer
   x = 18,240,378.40