Finding the Fourth Proportional to 42,697,457.60, 64,050,124.04 and 13,943,742.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,697,457.60 : 64,050,124.04 = 13,943,742.80 : x
2. Step 2: Convert to fraction form
   42,697,457.60/64,050,124.04 = 13,943,742.80/x
3. Step 3: Cross multiply
   42,697,457.60x = 64,050,124.04 × 13,943,742.80
4. Step 4: Simplify right side
   42,697,457.60x = 893,098,455,921,857
5. Step 5: Solve for x
   x = 893,098,455,921,857/42,697,457.60
6. Step 6: Final answer
   x = 20,916,900.12