Finding the Fourth Proportional to 42,056,441.76, 63,091,584.48 and 12,909,549.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,056,441.76 : 63,091,584.48 = 12,909,549.12 : x
2. Step 2: Convert to fraction form
   42,056,441.76/63,091,584.48 = 12,909,549.12/x
3. Step 3: Cross multiply
   42,056,441.76x = 63,091,584.48 × 12,909,549.12
4. Step 4: Simplify right side
   42,056,441.76x = 814,483,908,903,189.62
5. Step 5: Solve for x
   x = 814,483,908,903,189.62/42,056,441.76
6. Step 6: Final answer
   x = 19,366,448.39