Finding the Fourth Proportional to 28,411,397.52, 42,623,409.42 and 13,257,062.16

Step by Step Solution

1. Step 1: Write the proportion equation
   28,411,397.52 : 42,623,409.42 = 13,257,062.16 : x
2. Step 2: Convert to fraction form
   28,411,397.52/42,623,409.42 = 13,257,062.16/x
3. Step 3: Cross multiply
   28,411,397.52x = 42,623,409.42 × 13,257,062.16
4. Step 4: Simplify right side
   28,411,397.52x = 565,061,188,152,069.62
5. Step 5: Solve for x
   x = 565,061,188,152,069.62/28,411,397.52
6. Step 6: Final answer
   x = 19,888,539.02